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1.
The flaky dry substance of fecal matter combined with toliet paper that is found on bathroom toliets
This toliet has not been cleaned in ages, look at all of the shit crumbs!
by D Phil March 04, 2006
 
2.
Fecal matter trapped in anal cavity and or particles remaining in or around under dressings.

Not wiping properly may result in shit crumbs.
by TheTinglies October 22, 2008
 
3.
Those brown specks on the bathroom floor around the toilet.
Those aren't little pieces of milk chocolate on your bathroom floor. Them is shit crumbs!
by wouldaben January 08, 2011