What is F9?
1.
A stupid acronym for "fine" used in online chatrooms and instant messengers. Phonetically you are saying fnine which sounds quite retarded so do not use it. "Fine" is a short enough, there is no need to condense it.
One: How are you?
Two: I'm f9
One: You're fnine? WTF does that mean retard
See
2.
That's just f9.
A: u ok?
B: yeh, f9
See