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A person who gahub's. They're like a goof on steroids. They're not stupid, but they act like they're trying to be the loudest, most annoying kid in the room just to get a laugh, even if it's at their own expense.
'Why did you trip over your own feet? Because you're a gahuba!'
'He started a dance battle in the middle of math class. Classic gahuba.'
'She tried to juggle three phones and a sandwich. That's what gahubas do.'