crum ‧ ple /ˈkrʌmp ə l/ BrE AmE verb
[ Date: 1300-1400 ; Origin: crump 'to curl up' (14-19 centuries) , from crump , crumb 'bent' (11-18 centuries) , from Old English ]
1 . [intransitive and transitive] ( also crumple up ) to crush something so that it becomes smaller and bent, or to be crushed in this way:
Dan tore the page out, crumpled it, and threw it in the wastepaper basket.
2 . [intransitive] if your face crumples, you suddenly look sad or disappointed, as if you might cry
3 . [intransitive] if your body crumples, you fall down in an uncontrolled way
crumple to
The blow hit him on the head and he crumpled to the ground.