verb
crumbles; crumbled; crumbling
[+ obj] :to break (something) into small pieces
[no obj] :to separate into many small pieces :to fall apart
[no obj] :to break down completely :to stop functioning
that's the way the cookie crumbles
noun
plural crumbles
crumbles [plural] US :small pieces of something that has been crumbled
[count, noncount] chiefly Brit :2crisp