crumble

1 crumble /ˈkrʌmbəl/ verb
crumbles; crumbled; crumbling
1 crumble
/ˈkrʌmbəl/
verb
crumbles; crumbled; crumbling
Britannica Dictionary definition of CRUMBLE
1 
[+ object] : to break (something) into small pieces
2 
[no object] : to separate into many small pieces : to fall apart
3 
[no object] : to break down completely : to stop functioning

that's the way the cookie crumbles

— see cookie
2 crumble /ˈkrʌmbəl/ noun
plural crumbles
2 crumble
/ˈkrʌmbəl/
noun
plural crumbles
Britannica Dictionary definition of CRUMBLE
1 
crumbles [plural] US : small pieces of something that has been crumbled
2