1. To strike someone or something repeatedly and very forcefully; to thrash someone or something. A noun or pronoun can be used between "whack" and "up." The poor animal spent most of its life in a cage getting whacked up by its owners, before we managed to rescue it. My mama used to whack me up when I misbehaved as a kid.
2. To control or dominate someone or some group very thoroughly or severely. A noun or pronoun can be used between "whack" and "up." They really whacked our team up during the first half of the game, but we managed to make one heck of a comeback in the second. The prosecutor whacked up the defendant during the cross-examination.
3. To post or present something that one has assembled, produced, or created, especially very suddenly, hurriedly, or haphazardly. A noun or pronoun can be used between "whack" and "up." The company has whacked up yet another list of rules and regulations. You're never going to make it as a YouTuber if you're content to just whack a new video up every now and then.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
wack someone/something upverb
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.