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A little piece of dried poop, which, when pulled loose, takes along with it a collection of butt hairs so it resembles a spider body and hair legs.

It's a guy thing. Women do not have ass spiders.
When he pulled the crusty bit loose it ripped out a bunch of butt hairs leaving him holding a worthy ass spider in the paper.
by LabMom July 30, 2009
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<i> noun </i> generic term for any type of sexually transmitted parasite.
"i heard you banged rhoda kirkman." "yeah, dude. i got a bad case of ass spiders from her."
by the dastardly one December 30, 2003
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