crum·ple 
/ˈkrʌmpəl/ verb
crum·ples; crum·pled; crum·pling /ˈkrʌmpəl/ verb 1 a [+ obj] : to press or squeeze (something) so that it is no longer flat or smooth
▪ She crumpled the piece of paper into a ball and tossed it into the garbage can. ▪ The car's fender was crumpled in the accident. ▪ a crumpled napkin/suit/bill — often + up ▪ He crumpled up the note and threw it away.
b [no obj] : to become wrinkled or bent : to stop being smooth or flat
▪ The fabric is stiff and does not crumple [=wrinkle, rumple] easily. ▪ Her face crumpled [=she looked like she was going to cry] when we told her that she couldn't come with us. 2 [no obj] : to suddenly bend and fall
▪ At the sight of blood, he crumpled to the floor.
▪ She crumpled the piece of paper into a ball and tossed it into the garbage can. ▪ The car's fender was crumpled in the accident. ▪ a crumpled napkin/suit/bill — often + up ▪ He crumpled up the note and threw it away.
b [no obj] : to become wrinkled or bent : to stop being smooth or flat
▪ The fabric is stiff and does not crumple [=wrinkle, rumple] easily. ▪ Her face crumpled [=she looked like she was going to cry] when we told her that she couldn't come with us.
▪ At the sight of blood, he crumpled to the floor.
