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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.
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.