Top Definition
A small terd that resides in you're butt crack, that you aren't aware is there until you change you're shorts. Usually arrives as the bi-product of a large fart.
I thought my butt crack was sweating until I changed my shorts and found a two inch Crack Slug!
ayon kay TheMarmot ika-26 ng Hunyo, 2006
5 Words related to Crack Slug

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