That's the way the cookie crumbles.

Phew! It hurts me to see my identity crumble.

Dan crumbled the sandwich and threw it to the floor.

Tom crumbled up biscuits and mixed them into the quark.

Without warning, the lighthouse began to crumble under their feet.

The fascist racist separatist movement will soon crumble.

This is not wishful thinking or a dream that may be set to crumble before our eyes.

Sami's world crumbled.

The volcano crumbled into the sea.

The old masonry was beginning to crumble.