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 27, 2008
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Any hair or distinctive marking around the anus
Look at the asstache on that cat.
by Kevin Walter December 8, 2008
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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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the hair in and around a persons ass
mike has to shave his asstache said dina
by bosk3r69 August 30, 2009
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The act of sending an email without it's intended attachment, forcing you to resend another email with the attachment AND a bumbling apology for being so absented minded.
Bill sent the email out with attaching the drawing, forcing him to send an asstachment immediately after.

by Kim Browne April 3, 2006
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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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