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Phrase(s): whack someone or something up
Sl. to damage someone or something. • Bob got mad at Greg and whacked him up. • Clara whacked up her car yesterday., Phrase(s): whack something up
Sl. to chop something up. • In about an hour, he had whacked the tree up into small logs. • Have you whacked up the chicken for frying yet?
McGrawhill's American Idioms And Phrasal Verbs