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A pimlpe or zit on your ass
Jon asked his girlfriend to pop his Ass-troid after they had sex in the shower.
by Clean ass June 30, 2009
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The space rocks that fall to earth and get stuck in peoples' asses, or people who act like said space rocks.
"You are such an asstroid!"

"Are you going to the gay parade, asstroid?
by Tessthemess:) November 12, 2009
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