i Register
In some senses, bff is marked as informal. Watch for register when choosing this word.
bff
/ˌbiː.ɛfˈɛf/
noun 3
Definitions
noun
1
Initialism of best friend forever.
Put a pub crawl together with your BFFs, do sake bombs while you wail your heart out at a karaoke bar, play some sloshball with your friends in the park.
2
Initialism of backend for frontend.
noun
1
Alternative letter-case form of BFF.
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