A random piece of debris and or food particle which accumulate in a confined area, and then, without your acknowledgment, fall into something in which you do not wish it to fall into
ex 1: shit, my grapey juice has crumbums in it..motherfucker left the lid off the juice jug.
by exzimazittitcackly February 3, 2009
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a person who acts like they are homeless are not necessarily living on the street.
John: I just gave jen some cash she said she doesnt know where she is sleeping at tonight.
Steve: thats wierd cus she lives with her parents.
John: what a fuckin crumbum
by bbandit April 20, 2009
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Poor person who claims too much benefit and spensd it all on drugs, prior to robbing the local petrol station.
The crumbum was found underneath the bridge with a porno mag, bottle of cider and empty bottlebag.
by Andy 'Wastic' Aldrich June 17, 2003
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1)Eating cookies or toast over someones ass.

2)A fucking moron; a Douche
I apologize for the CrumBum last night.
by MrBlack1984 July 1, 2006
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A crumbum searches the carpet around an area where drugs were done. Finders keepers for what that days crumming yields. Mostly for meth or other crummable drugs...aka..green pot, white coke, black dab, any pills of a variety of candy colors.
Boy, look at that crumbum go to town on that prostitutes carpet.
by Final Gordon November 30, 2021
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A person or thing that actively seeks out other people's leftover crumbs.
That chip barely hit the floor and that crumbum of already ate it up.
by BluJ November 27, 2019
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