Definitions for "Crumpled"
having wrinkles; "crumpled paper"; "her skirt had become creased"; "a rumpled gray suit"
Just as in plain English, physicists use crumpled to mean something that has irregular wrinkles, is collapsed or crushed. A simple example would be to crumple a piece of paper by crushing it in your hands. See also crumpling transition.
Keywords:  fenders, dented, bent, nails, car
of metal e.g.; "bent nails"; "a car with a crumpled front end"; "dented fenders"