What does the term "crumbling" mean in Australian Football?

there no term called crumbling, think mean crumbing, means when under pack , pick crumbs fall off, speak, in other words crumb pack, (gather ball off marking contest etc)

edit- think if asking question, not aussie, i'll try explain in simpler terms, pack 3 or more players, going same ball, trying catch it, mark, players drop mark , smaller players try , pick ball off pack, call crumbing. player can described crumber also, he'd specializes in reading flight of ball when it's kicked pack , runs front or of pack , tries grab ball. that's really.

edit- hamish, wouldn't call crumbling term mate, it's way of describing if team falling apart pressure really, there term called 'crumbing' it's been part of football decades , decades. think our international friend has got mixed up. crumbling word used in sport, whereas crumbing unique aussie rules.

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