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Derived from the Soul Caliber character "Astaroth" an asstooth is a big, bumbling, klutzy galoomph of a person who is obviously doing something that requires negative use of the brain.
"No, it's probably NOT a good idea to stick your hand in the waffle iron, asstooth"

"whatever ,asstooth" - usually said in exasperation when someone keeps talking about the new plumbing they're installing in their bathroom.
by nycbuckeye October 13, 2004
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