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2.
When the hair in your ass crack is so long, it looks like a mustache.
Hey, Nice Buttstache!!!
by Scat-lover April 25, 2004
 
1.
1) An abnormal amount of hair in the butt area.

2) Anyone or anything that has the aforesaid abnormal amount of hair in the butt region.
1) " wow did you see anthony's buttstache? it is soooo nasty."

2)" holy macaroni, chris is one giant buttstache."
by S-Trip June 23, 2007
 
3.
The collection of hair around and atop the asshole. Forming a moustache of sorts on the butt.
"Damn bro, nice buttstache."
by labia lightnin January 03, 2007
 
4.
A hairy, unkept bum.
That girl should not be wearing a thong at the beach, she obviously hasn't waxed her buttstache in months.
by sara r. August 08, 2005
 
5.
Similar to a moustache, but instead of being on a mans upper lip a 'butt-stache' is the patch of hair found just above a mans butt crack.
quote "baby, you gotta shave your butt-stache"
by Joe Magnuson April 05, 2007