ftp = for the pwn; a variant of ftw (= "for the win")
Used primarily in gamer-world, ftp is a more specific version of ftw. It's used when someone declares victory in an argument or discussion with an insurmountable rebuttal or insult.
We'll go with a classic SNL Celebrity Jeopardy example:
Alex Trebek: It's not "Ape Tit." It's A Petit.. shakes head ..never mind! Let's just go to "Animal Sounds" for $600. This is the sound a doggy makes. Connery buzzes in Mr. Connery.
Sean Connery: Moo. buzzer sounds
Alex Trebek: No.
Sean Connery: Well, that's the sound your mother made last night! laughs
a bitch who makes a lot of noise when fucking.
according to sean connnery, your mother.
Sean Connery: I had relations with your mother this morning, hope we didn't wake you. Your mother's a screamer!
Alex Trebek: My mother is in a nursing home in Alberta...
Sean Connery: Oh, she was nursing it, all right!