BFF stands for best friend forever, but in practice it simply means best friend. People use it in texting, photo captions and birthday messages. It sounds warm and playful.
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my/her + bff; be + bffs; bffs + since + time
- Me and my bff are going to Lisbon for a long weekend!
- Happy birthday to my bff, thanks for putting up with me for ten years!
- We've been bffs since our first week at uni.
What changed
First versionDear Sir or Madam, I would like to book a twin room for myself and my bff.
RevisionDear Sir or Madam, I would like to book a twin room for myself and my friend.
An email to a hotel is formal, while bff is a word from chatting with friends, and in a booking it sounds unserious. The hotel doesn't need to know how close you are to the person you're travelling with, so the neutral my friend is enough.
Out loud, BFF is spelled out letter by letter: B-F-F. For two friends, use the plural: They've been BFFs since primary school. Bff isn't used in letters, essays or IELTS Speaking; say my best friend or my closest friend instead.
Your turn
Anna has been like a sister to me since primary school, she's my ___ and knows all my secrets.
Show the answer
bff — Anna is like a sister to you and knows all your secrets, which is the closest kind of friendship, so bff fits. A crush is a romantic infatuation and doesn't go with like a sister.
Write a caption for a photo of you and your best friend. Say how many years you've been friends and what you're doing in the picture.
Me and my bff hiking in Wales, twelve years of friendship and she still walks faster than me!
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