Top 47 Slang For Promise – Meaning & Usage

When it comes to making commitments and assurances, having the right slang can add a touch of flair to your promises. Join us as we uncover the top slang terms for promise, from casual affirmations to heartfelt vows. Stay tuned to level up your language game and add some pizzazz to your pledges!

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1. I’ll swear on a stack of donuts

This phrase is used to emphasize the sincerity and seriousness of a promise. Swearing on a stack of donuts implies that the promise is as solid and unbreakable as a stack of delicious pastries.

For example, “I’ll swear on a stack of donuts that I’ll be there on time.”
A friend might say, “I promise to help you move this weekend. I’ll swear on a stack of donuts.”
Someone might use this phrase to convince others of their commitment, saying, “I’ll swear on a stack of donuts that I’ll never let you down.”

2. I’ll swear on a stack of pizza

Similar to the previous phrase, this slang for promise uses the image of a stack of pizza to convey the certainty and dedication behind the commitment. Pizza is often seen as a beloved and reliable food, making the promise even more impactful.

For instance, someone might say, “I’ll swear on a stack of pizza that I’ll finish the project on time.”
A person might assure their friend, “I promise to always have your back. I’ll swear on a stack of pizza.”
This phrase can also be used humorously, such as, “I’ll swear on a stack of pizza that I’ll eat healthier… after this slice.”

3. I’ll swear on a stack of burgers

Using the image of a stack of burgers, this slang for promise conveys a strong sense of commitment and determination. Burgers are often associated with satisfaction and indulgence, adding weight to the promise.

For example, “I’ll swear on a stack of burgers that I’ll never betray your trust.”
A person might convince someone of their loyalty, saying, “I promise to always be there for you. I’ll swear on a stack of burgers.”
This phrase can also be used playfully, such as, “I’ll swear on a stack of burgers that I’ll win the eating contest.”

4. I’ll swear on a stack of fries

Similar to the previous phrases, this slang for promise uses the image of a stack of fries to emphasize the sincerity and seriousness of the commitment. Fries are a popular and beloved food, making the promise more relatable and impactful.

For instance, someone might say, “I’ll swear on a stack of fries that I’ll never lie to you.”
A friend might assure their friend, “I promise to always support you. I’ll swear on a stack of fries.”
This phrase can also be used humorously, such as, “I’ll swear on a stack of fries that I’ll finally go to the gym… after this meal.”

5. I’ll swear on a stack of ice cream

Using the image of a stack of ice cream, this slang for promise conveys a strong sense of certainty and dedication. Ice cream is often associated with joy and comfort, making the promise more impactful and meaningful.

For example, “I’ll swear on a stack of ice cream that I’ll always be there for you.”
A person might convince someone of their commitment, saying, “I promise to never break your heart. I’ll swear on a stack of ice cream.”
This phrase can also be used playfully, such as, “I’ll swear on a stack of ice cream that I’ll never skip dessert.”

6. I’ll swear on a stack of cookies

This phrase is used to express a strong commitment or assurance. It implies that the person is willing to make a promise with utmost sincerity and honesty.

For example, “I’ll swear on a stack of cookies that I’ll be there for you.”
In a conversation, someone might say, “I’ll swear on a stack of cookies that I didn’t take your pen.”
Another person might use this phrase to emphasize their trustworthiness, saying, “I’ll swear on a stack of cookies that I’ll never let you down.”

7. Word is bond

This slang phrase is used to convey a strong and unwavering commitment to a promise. It implies that the person’s word is their bond and can be trusted without question.

For instance, “I’ll be there at 8 pm, word is bond.”
In a conversation, someone might say, “I’ll finish the project by tomorrow, word is bond.”
Another person might use this phrase to emphasize their trustworthiness, saying, “I’ll never betray your confidence, word is bond.”

8. I’ll back it up

This phrase is used to indicate that the person will not only make a promise but also follow through with actions to support it. It implies that they are willing to provide evidence or proof of their commitment.

For example, “I’ll back it up with my actions and show you that I mean what I say.”
In a conversation, someone might say, “I’ll back it up by working extra hours to meet the deadline.”
Another person might use this phrase to assure someone, saying, “I’ll back it up with my loyalty and always have your back.”

9. I’ll vouch for it

This phrase is used to express a personal guarantee or endorsement of a promise. It implies that the person is willing to vouch for the reliability or truthfulness of the statement.

For instance, “I’ll vouch for it and confirm that he is telling the truth.”
In a conversation, someone might say, “I’ll vouch for it and assure you that the product is of high quality.”
Another person might use this phrase to support someone’s reputation, saying, “I’ll vouch for it and say that she is a trustworthy person.”

10. I’ll guarantee it

This phrase is used to indicate a strong assurance or guarantee of a promise. It implies that the person is confident in their ability to fulfill the promise and is willing to take responsibility for its fulfillment.

For example, “I’ll guarantee it and make sure it gets done.”
In a conversation, someone might say, “I’ll guarantee it and ensure that you receive excellent customer service.”
Another person might use this phrase to emphasize their confidence, saying, “I’ll guarantee it and prove to you that I can succeed.”

11. I’ll swear up and down

This phrase is used to emphasize the sincerity or truthfulness of a promise. It suggests that the speaker is so confident in their promise that they would be willing to swear an oath or testify to its truth.

For example, a person might say, “I’ll swear up and down that I’ll be there for you when you need me.”
In a conversation about trust, someone might say, “If he says he’ll do it, he’ll swear up and down that he means it.”
A friend might reassure another by saying, “Don’t worry, I’ll swear up and down that I’ll keep your secret.”

12. I’ll pledge my allegiance

This phrase is used to express a strong and unwavering promise or commitment. It compares the promise to the loyalty and dedication one would show when pledging allegiance to a country or cause.

For instance, someone might say, “I’ll pledge my allegiance to you and always support you.”
In a discussion about loyalty, a person might declare, “I’ll pledge my allegiance to my friends and always have their back.”
A character in a romantic movie might say, “I’ll pledge my allegiance to you and love you forever.”

13. I’ll give you my solemn vow

This phrase is used to convey a solemn and serious promise. It suggests that the speaker is making a commitment with great sincerity and integrity.

For example, someone might say, “I’ll give you my solemn vow that I will never betray your trust.”
In a marriage ceremony, the couple might exchange vows by saying, “I’ll give you my solemn vow to love and cherish you.”
A person might reassure a friend by saying, “I’ll give you my solemn vow that I’ll always be there for you.”

14. I’ll promise you the moon

This phrase is used to make an exaggerated or grand promise. It suggests that the speaker is willing to make unrealistic or extravagant commitments in order to please or impress someone.

For instance, someone might say, “I’ll promise you the moon and stars if you’ll just give me a chance.”
In a conversation about romance, a person might say, “He promised me the moon, but couldn’t deliver.”
A character in a movie might make a grand gesture and say, “I’ll promise you the moon if you’ll stay with me.”

15. I’ll make an oath

This phrase is used to indicate a formal and binding promise. It suggests that the speaker is willing to make a commitment that carries legal or moral weight, similar to making an oath in a court of law.

For example, someone might say, “I’ll make an oath to always protect and support you.”
In a discussion about trustworthiness, a person might say, “If I make an oath, you can be sure I’ll keep it.”
A character in a fantasy novel might declare, “I’ll make an oath to defeat the evil sorcerer and save the kingdom.”

16. I’ll make a commitment

This phrase is used to express a strong intention or promise to follow through with a certain action or responsibility.

For example, “I’ll make a commitment to work out every day this week.”
Someone might say, “I’ll make a commitment to be there for you whenever you need me.”
In a conversation about personal growth, a person might declare, “I’ll make a commitment to prioritize self-care and self-improvement.”

17. I’ll make a pact

This phrase is used to express a mutual promise or agreement between two or more people to work together towards a common goal or outcome.

For instance, “I’ll make a pact with my best friend to travel the world together.”
Two business partners might say, “We’ll make a pact to always support each other’s professional endeavors.”
In a conversation about achieving a shared objective, a group might declare, “We’ll make a pact to give our best effort and not give up.”

18. I promise on everything I hold dear

This phrase is used to emphasize the sincerity and seriousness of a promise by invoking the value and significance of personal beliefs or cherished possessions.

For example, “I promise on everything I hold dear that I will always be there for you.”
Someone might say, “I promise on everything I hold dear that I will never betray your trust.”
In a conversation about keeping a secret, a person might declare, “I promise on everything I hold dear that I will never reveal this information.”

19. I vow

This phrase is used to express a solemn and serious promise, often with a sense of commitment and determination.

For instance, “I vow to always love and support you.”
Someone might say, “I vow to dedicate my life to fighting for justice.”
In a conversation about personal goals, a person might declare, “I vow to never give up on my dreams.”

20. I pledge

This phrase is used to express a formal or public promise to take a specific action or support a particular cause.

For example, “I pledge to donate a portion of my earnings to charity.”
Someone might say, “I pledge to always stand up against injustice.”
In a conversation about environmental conservation, a person might declare, “I pledge to reduce my carbon footprint and live a sustainable lifestyle.”

21. I assure you

This phrase is used to express a strong guarantee or assurance. It is often used to reassure someone or to emphasize the sincerity of a promise.

For example, “I assure you, I will do everything in my power to make it right.”
In a business context, a salesperson might say, “I assure you, our product will meet your needs.”
Someone might say, “I assure you, I won’t let you down.”

22. I guarantee

This phrase is used to make a strong commitment or assurance. It is often used to emphasize the certainty or reliability of a promise.

For instance, “I guarantee you’ll love this product.”
In a negotiation, someone might say, “I guarantee you’ll get the best deal.”
A person might say, “I guarantee I’ll be there on time.”

23. I commit

This phrase is used to express a firm commitment or promise. It is often used to convey dedication or responsibility to a certain action or outcome.

For example, “I commit to finishing the project by the deadline.”
In a relationship, someone might say, “I commit to being faithful and supportive.”
A person might say, “I commit to always being there for you.”

24. I avow

This phrase is used to make a solemn or formal promise. It is often used in a serious or legal context to express a commitment or declaration.

For instance, “I avow to tell the truth, the whole truth, and nothing but the truth.”
In a marriage ceremony, someone might say, “I avow to love and cherish you.”
A person might say, “I avow to fight for justice and equality.”

25. I affirm

This phrase is used to assert or confirm a promise. It is often used to emphasize the truth or validity of a statement or commitment.

For example, “I affirm my loyalty to this organization.”
In a religious context, someone might say, “I affirm my faith in God.”
A person might say, “I affirm my commitment to this cause.”

26. I make a vow

This phrase is used to express a strong and serious promise. It signifies a commitment that is made with great determination and conviction.

For example, “I make a vow to always be there for you, no matter what.”
In a wedding ceremony, the couple might exchange vows, saying, “I make a vow to love and cherish you for the rest of my life.”
Someone might say, “I make a vow to never give up on my dreams, no matter how challenging they may be.”

27. I make a solemn promise

This phrase is used to emphasize the gravity and sincerity of a promise. It conveys a sense of deep commitment and dedication.

For instance, “I make a solemn promise to always protect and support you.”
In a legal context, a witness might say, “I make a solemn promise to tell the truth, the whole truth, and nothing but the truth.”
Someone might say, “I make a solemn promise to never let you down.”

28. I make a sacred promise

This phrase is used to convey a promise that is considered sacred or highly important. It signifies a commitment that is deeply meaningful and held in high regard.

For example, “I make a sacred promise to always honor and cherish our friendship.”
In a religious context, a person might say, “I make a sacred promise to follow the teachings of my faith.”
Someone might say, “I make a sacred promise to always be true to myself.”

29. I make a heartfelt promise

This phrase is used to express a promise that is made with genuine and heartfelt sentiment. It conveys a sense of authenticity and emotional investment.

For instance, “I make a heartfelt promise to always be there for you, no matter what.”
In a romantic context, a person might say, “I make a heartfelt promise to love you unconditionally.”
Someone might say, “I make a heartfelt promise to always support and encourage you in your dreams.”

30. I make a sincere promise

This phrase is used to emphasize the honesty and truthfulness of a promise. It conveys a sense of authenticity and integrity.

For example, “I make a sincere promise to always be honest with you.”
In a professional context, a person might say, “I make a sincere promise to deliver high-quality work.”
Someone might say, “I make a sincere promise to always listen to your concerns and address them.”

31. I make a solemn vow

When someone makes a solemn vow, they are making a promise in a very serious and sincere manner.

For example, a bride might say, “I make a solemn vow to love and cherish you for the rest of my life.”
In a religious context, a person might make a solemn vow to follow certain teachings or principles.
Someone might make a solemn vow to themselves, such as “I make a solemn vow to quit smoking and improve my health.”

32. I make a binding promise

When someone makes a binding promise, they are making a promise that is legally or morally obligated to be fulfilled.

For instance, a person might say, “I make a binding promise to pay back the loan by the agreed-upon date.”
In a business setting, two parties might make a binding promise to adhere to the terms of a contract.
A parent might make a binding promise to their child, such as “I make a binding promise to always be there for you.”

33. I make a firm promise

When someone makes a firm promise, they are making a promise with determination and resolve, indicating their strong commitment to fulfilling it.

For example, a person might say, “I make a firm promise to work hard and achieve my goals.”
In a relationship, one partner might make a firm promise to be faithful and loyal.
A student might make a firm promise to themselves to study diligently and improve their grades.

34. I make a resolute promise

When someone makes a resolute promise, they are making a promise with unwavering determination and dedication, showing their strong commitment to keeping it.

For instance, a person might say, “I make a resolute promise to overcome any obstacles and succeed.”
In a personal growth context, someone might make a resolute promise to improve their mental or physical health.
A friend might make a resolute promise to always be there for their loved ones in times of need.

35. I make a steadfast promise

When someone makes a steadfast promise, they are making a promise with unwavering loyalty and devotion, indicating their strong commitment to staying true to it.

For example, a person might say, “I make a steadfast promise to support you no matter what.”
In a friendship, one friend might make a steadfast promise to always have their friend’s back.
A caregiver might make a steadfast promise to take care of their loved one with unwavering dedication.

36. I make a true promise

This phrase is used to emphasize the sincerity and truthfulness of a promise. It conveys a strong sense of commitment and trustworthiness.

For example, “I make a true promise to always be there for you no matter what.”
When someone is trying to convince another person of their sincerity, they might say, “I make a true promise that I will never let you down again.”
In a heartfelt conversation, someone might say, “I make a true promise to love you unconditionally for the rest of my life.”

37. Pinky promise

This term is commonly used among friends, especially children, to solidify a promise and ensure its sincerity.

For instance, two friends might say, “Let’s pinky promise that we’ll be best friends forever.”
In a playful conversation, someone might say, “I pinky promise that I won’t eat all the cookies.”
When trying to convince someone of their dedication, a person might say, “I pinky promise that I’ll always be there for you.”

38. Cross my heart and hope to die

This phrase is used to emphasize the gravity and importance of a promise. It implies that the speaker is willing to face dire consequences if they break their promise.

For example, “Cross my heart and hope to die, I will never betray your trust.”
When someone is trying to assure another person of their honesty, they might say, “Cross my heart and hope to die, I’ll always keep your secrets.”
In a serious conversation, someone might say, “Cross my heart and hope to die, I’ll never hurt you again.”

39. Promise me the moon

This phrase is used to express a desire for something unattainable or highly unlikely. It often conveys the idea of making grand gestures or promises for the sake of winning someone over.

For instance, someone might say, “He promised me the moon, but never followed through.”
In a romantic conversation, a person might say, “Promise me the moon, and I’ll give you my heart.”
When someone is skeptical of someone else’s promises, they might say, “Don’t promise me the moon if you can’t deliver.”

40. I swear on everything I love

This phrase is used to emphasize the speaker’s strong belief in the promise they are making. It signifies that the speaker is willing to stake their most cherished possessions or relationships on the fulfillment of their promise.

For example, “I swear on everything I love that I will never lie to you.”
When someone is trying to convince another person of their dedication, they might say, “I swear on everything I love that I’ll always be there for you.”
In a serious conversation, someone might say, “I swear on everything I love that I’ll never hurt you again.”

41. I’ll go to the ends of the earth for you

This phrase is used to express a strong commitment to someone or something. It means that the person is willing to go to great lengths and make great sacrifices for the other person.

For example, someone might say, “I promise, I’ll go to the ends of the earth for you if you need me to.”
In a romantic context, a person might declare, “I love you so much that I would go to the ends of the earth for you.”
A friend might reassure another friend by saying, “Don’t worry, I’ll go to the ends of the earth for you if you ever need help.”

42. I’ll stand by you no matter what

This phrase is used to promise unwavering support to someone, regardless of the circumstances or challenges they may face.

For instance, a person might say, “I promise, I’ll stand by you no matter what happens.”
In a friendship, one person might assure the other by saying, “You can always count on me. I’ll stand by you no matter what.”
A parent might say to their child, “I’ll stand by you no matter what choices you make in life. I love you unconditionally.”

43. I’ll be there for you through thick and thin

This phrase is used to promise unwavering support and loyalty to someone, regardless of the challenges or difficulties they may face.

For example, a person might say, “I promise, I’ll be there for you through thick and thin.”
In a friendship, one person might reassure the other by saying, “You can always rely on me. I’ll be there for you through thick and thin.”
A partner might declare their commitment by saying, “I’ll be there for you through thick and thin, no matter what life throws at us.”

44. I’ll never let you down

This phrase is used to promise that the person will always come through for the other person and never disappoint them.

For instance, someone might say, “I promise, I’ll never let you down. You can always count on me.”
In a friendship, one person might reassure the other by saying, “You know I’ll always be there for you. I’ll never let you down.”
A parent might say to their child, “I’ll always be there to support you and guide you. I’ll never let you down.”

45. I’ll keep my end of the bargain

This phrase is used to promise that the person will fulfill their obligations or promises as agreed upon.

For example, someone might say, “I promise, I’ll keep my end of the bargain. You can trust me.”
In a business context, a person might assure their partner by saying, “I’ll make sure to keep my end of the bargain. We have a deal.”
A friend might declare their commitment by saying, “Don’t worry, I’ll keep my end of the bargain. I’ll do what I promised.”

46. I’ll assure you with all my heart

This phrase is used to emphasize the sincerity and certainty of a promise. It implies that the speaker is making a heartfelt and genuine commitment to fulfill their promise.

For example, a person might say, “I’ll assure you with all my heart that I will be there for you no matter what.”
In a romantic context, someone might say, “I cross my heart and assure you that I will always love you.”
A friend might say, “You can trust me, I’ll assure you with all my heart that I won’t let you down.”

47. I’ll guarantee it with my life

When someone says they will guarantee something with their life, it means they are making an extremely solemn and serious promise. They are emphasizing the importance and significance of their commitment.

For instance, a person might say, “I’ll guarantee it with my life that I will protect you no matter what.”
In a situation where trust is crucial, someone might say, “I swear on my life that I will keep your secret.”
A person might make this promise to a loved one, saying, “I’ll guarantee it with my life that I will always be there for you.”