b-button whore
A person who plays so bad they just hit B like it’s their last hope. They think pressing B means they’re winning.
DM: 'You’re the B-button whore of the game. I had to dodge your meaty face 10 times.'
In-game chat: 'B-button whore! You didn’t even try to shoot me!'
Voice chat: 'You’re the B-button whore! You just hit B and expected to win.'