You type gf when your too lazy to write out girlfriend.
random guy-wow you have a pretty gf.
Is used when you need to say something rude to someone in the presence of others. it is then appropriate to use gf.
shorthand for girlfriend.
Sorry, I already have plans with the gf tonight.
On line chat abbreviaton for Girl Friend
No, I cant play a game with you, im going to my GF's house after this.
that one thing that kids bully
p1: do you have a gf
p2: ew! no!
p1: oh, i know you have you drunkhead
p2: *leaves
Good fight is used in online video games after fight
Example:
Boi 1: Kills Boi 2 with 2 hp remaining
Boi 2: Gf
For geeks, shorthand for GeForce, in reference to the NVIDIA GeForce line of video cards