A bum crumb is an object that is forced up your buttock when you sit on it. It can also be spelt like this: bumb crumb.
What happened doctor? Oh you had a rare inconvenience called a bum crumb also known as the bummeth crumbosis it is when an object becomes suck up ones buttock when they sit on it.
by I'm a smart one April 21, 2020
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Another way of saying "Sh*t"!
It's much more babyish and boffin, but funner to say and isn't illegal in schools.

It was made up by Drayton-Kids from West London.

Yes... Londoners are strange.
Bob: Your mum just died.
Jim: Oh bum-crumb!
Bob: Correct... Bum-crumb.
by TheSchmexxieDevil January 23, 2009
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a bum crumb ass nigga is that one nigga who thinks they the shit but actually fucken ass at everything they do, video games, school, and hell, even making friends. You can tell if somebody’s a bum crumb ass nigga if they wear their beanie at the top of their head with the top of the beanie all raggy n shit. They also wear baseball caps backwards and sitting on the top of their head so that they seem to have a tall head, bc their heads are small and their brains are small, and end up looking extra retarded.
Person 1: damn yo Damian is a fucken bum crumb ass nigga
Person 2: what do you mean?
Person 1: I mean just look at how this bum ass nigga wears his hat! Wtf!?
by senor_jerome November 18, 2019
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A term of utter contempt for a worthless, meretricious person, a no-account, with the implication that s/he is of low moral character.

A "bum" has long been an Americanism for a tramp, vagabond or homeless person (and lacking in the "backside" meaning as in the U.K.). The "crumb" may come from the irritating or useless character of bread crumbs or toaster crumbs, but it is possible (despite the spelling) that the first syllable derives from "crummy" as in worthless, detestable. The internal rhyme solidifies the expression.
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"I have no use for my daughter's ex-husband. Ever since the divorce he drifts from job to job and is always behind on child-support payments. He doesn't even send his child a birthday card! As far as I'm concerned, he's a complete crumb-bum."

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by al-in-chgo August 18, 2010
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Someone who is acting like a complete arse, affectionate insult
You crumb bum
by MH June 6, 2003
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Someone who isn't doing the work they're supposed to, who's being lazy.
Yo, crumb bum, get to work!
by Eriak July 23, 2009
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Not just being a bum but the lifestyle. Going around care-free, looking any type of way, acting any type of way.
Arely said,"Alonté wore sweat pants and a baggy sweatshirt to school instead of the uniform; he also skipped all of his classes today. A classic crumb bum."
by Tyreecro January 13, 2012
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