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.
1:
A minor inconvenience that shall hinder your day/night until it is fixed
2:
literally crumbs on the bed
1:
Person 1: ugh its a crumbs on the bed day
Person 2: ughhhhh
2:
Person 1: I have crumbs on my bed
Person 2: damn man that sucks
Person 3: that'd explain where my weed poptart went
Person 1: YOUR WHAT
Bits of dried leaves, twigs, dirt, etc., usually in a crushed form.
After I had gotten up off the sidewalk, my friend pointed out to me, "You have nature crumbs on your butt."
An inexperienced person that trades sexual favors for dope at a discounted rate. A shard whore in training.
Yo man, this crumb slut just blew me for a bowl pack. At that rate I think I will keep her for the weekend!
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Those little bits of poo left in the toilet after it has been flushed.
Girl goes to use toilet after her boyfriend..., "hey get back in here are get rid of these poo crumbs!"
small pieces of shit intertwined with tiny ass hairs and bikini lint
" She Flicked her fucking nasty Bikini Crumbs on to me" .. " oh really that means she likes you!"