crumple

A crease, wrinkle, or irregular fold.

To rumple; to press into wrinkles by crushing together.

He crumpled the note and threw it away.

To cause to collapse.

He crumpled the car's body panels when he backed into a post.

To become wrinkled.

The car's body panels crumpled when they hit the post.

To collapse; to surrender.

The team's defensive strategy crumpled.

The defenders crumpled owing to exhaustion and dehydration.