crumple

US /ˈkrʌm.pəl/
UK /ˈkrʌm.pəl/
"crumple" picture
1.

crush (something, especially paper or cloth) into folds or wrinkles

:
She crumpled the letter and threw it in the bin.
The car was badly crumpled in the accident.
2.

collapse or give way suddenly

:
His legs crumpled beneath him.
The building began to crumple after the explosion.