B-hard - somebody who acts like they're the most important person in

somebody who acts like they're the most important person in the room, even when they're clearly the worst at everything

'He's B-hard. He thinks he's the best at video games, but he can't even beat my little brother.'

'She called me B-hard because I tried to take credit for her idea.'

'My brother is B-hard. He thinks he's the reason we won the game, even though he missed every shot.'