A crumb cruncher is a playful — and sometimes exasperated — way to refer to a small child. The image is spot-on: little kids are basically crumb-producing machines, leaving a trail of snack debris everywhere they go. You'll hear it from parents venting to other parents, from childless adults dealing with their siblings' kids, or anyone who just discovered a crushed cracker in their couch cushions. It's teasing and affectionate more often than it is mean.
I love my nephew, but having a crumb cruncher in the car for a road trip is basically agreeing to clean up a disaster zone.
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(slang, humorous, or, pejorative) A child.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.