jackoff artist
A guy who thinks he's the best at everything because he can do one thing. He's like a kid who thinks he's the best at school because he knows how to spell 'cat'.
He bragged about his 'skills' for an hour, and it was just him fumbling with a sock.
He tried to be cool by saying he had 'a million different ways to jerk off'.
He once challenged me to a 'wank-off' and I won by just breathing.