Definitions by Dommmmmmm
Jk is when someone says there joking but really there saying fuck you and they mean it and they say jk just to not act like a douchebag
Jonh: your an ugly fucking troll get fucked bitch
Harry: what?
John: jk!
Harry: oh few thank God you were just kidding
Harry: what?
John: jk!
Harry: oh few thank God you were just kidding