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The gnome that lives just beyond the outer rim of your sphincter. It lives off of feces and the occasional corn chunk with are considered delicacies among all gnomes.
Every night sphincter gnome has been known to crawl out of your rectim and slap your testicles or tickle your gouch. Human flatulance is also a direct result of the sphincter gnomes growls. These growls are caused because the sphincter gnome tends to get alittle territorial when it sees a large peice of shit crushing its living room.
"god damn-it, my fucking sphincter gnome just bite my penis!"
by truth teller never lie2 September 05, 2009
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