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general::
Phrase(s): crumple up
to fold up; to collapse. • She was so frightened that she just crumpled up. • Fran crumpled up in a dead faint., Phrase(s): crumple something up
to fold up or crush someone or something. • Walter crumpled the paper up. • He crumpled up the paper.
McGrawhill's American Idioms And Phrasal Verbs