OBK = Original Bitch Kid
Bitch kid = Someone who sucks at everything and generally whines a lot about it.
Original Bitch Kid = The worst and whiniest of all your friends.
Brad - I suck at this game
Charlie - Yeah you do, you're gettin pwned right now!
Brad - I know, but it's kinda late and I only got 6 hours of sleep last night! Plus these guys practice all the time!
Charlie - Brad, you're an official OBK!