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whip (one's) ass
1. rude slang, verb To defeat someone or something decisively. We weren't prepared for that game, and the other team whipped our asses.
2. rude slang, verb To physically attack one; to beat one up. I'll whip your ass if I ever see you talking to my girlfriend again.
whip (or bust) someone's ass
use physical force to beat someone in a fight.