1
general::
Phrase(s): crumble something up (into something)
to crunch up or break up something into pieces. • Now, crumble the dried bread up into crumbs. • Crumble up the bread into crumbs., Phrase(s): crumble up
to break up into little pieces. • The cake, which was very dry, crumbled up when I tried to cut it. • The paper of the old book crumbled up when I turned the pages.
McGrawhill's American Idioms And Phrasal Verbs