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A man who thinks he's the king of the block, full of himself, and doesn't know when to shut up. He's got game, and he's not afraid to show it off like a brat in a candy store.
'You think you're a Mac Nut? I've seen tougher guys get beat up by a squirrel.'
'He walks in like he owns the place, but he's just a Mac Nut with a bad hair day.'
'That guy is a Mac Nut. He talks like he's the president, but he can't even remember his own phone number.'