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Related to crunch up: crunch down
To fracture or break someone or something. A noun or pronoun can be used between "crunch" and "up." Of course I worry about you riding a motorcycle—people get seriously crunched up in motorcycle accidents! I crunch up some cookies and add them to the icing—that's my secret recipe.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
crunch someone or something up
to break someone or something up into pieces. That machine will crunch you up. Stay away from it! A number of blows with the hammer crunched up the rocks into pebbles. Try to crunch the larger chunks up.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.