bf
BF
BF
Abbreviated form for Best Friend
BFS
bf
BF
bfs
their bf, but...
a term on snapchat which means "you're their best friend, but they aren't yours."
Example:
person 1: hey what emoji do i have on ur snap
person 2: uhhh *changes emoji from "their bf, but..." to "bff"*
person 1: hey what emoji do i have on ur snap
person 2: uhhh *changes emoji from "their bf, but..." to "bff"*