How the cookie crumbles?

Question

im not sure how the cookie crumbles i have no clue mate.

Answer 1

That phrase refers to the "dominoe effect" once your cookie is crumbling, it just keeps crumbling into a bigger mess.

Answer 2

the cookie crumble is just like leaving crumbs anywhere.

or people use it like a quote: when u spill a secret to somebody. just like: you-let-the-cat-out-of-the-bag.