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The tuff of hair just above the ass in the small of the back. Usually found only on men.
My friend showed me a picture of her boyfriends asstache. He really needs to shave it.
by Sidesmack January 26, 2008
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hair on your buttox
did you know that your asstache is connected to your eyes? Pluck one out, and check for yourself

Burnik in tagalog
by The-Deemo December 23, 2009
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when a man or woman fingers his or her own balloon knot then takes their dirty digit out and wipes it across the upper lip.
i was so pissed at jen that after i plowed her from behind i gave her an asstache... and she liked it...
by tommy kenny September 17, 2006
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