Male back hair which may be manscaped into a decorative form or left au natural. The Fu Manchu backstache is when the tops of the shoulders are hairy, as are the sides of the back (covering part of the shoulderblades), but the center of the back is clean.
So we went to the beach, and Jim took off his shirt to reveal a backstache. It was terrifying in its raw manliness.
A mustache adorned by fans of The Ohio State University. Sporting a buckstache often leads one to a life of crime and perversion. The buckstache was made famous by the Michigan Wolverine based blog The M Zone. A cousin to the Buckstache is the Warstache, a mustache worn by Auburn fans. The Warstache will lead one to a life of bestiality.
Paul's life took a turn for the worse when he decided to grow a Buckstache.
A rare medical condition in which the sufferer's back is engulfed in a thick, black, musky muff of hair. Usually those afflicted happen to be extremely short and tend to remain virgins well into their forty's. Sometimes affects the torso and genitals, in these cases the condition is referred to as an "Italian Bodystache".
When Tom removed his shirt revealing his Italian Backstache at the community pool, Jefferson grabbed his son and ran fearing a grizzly attack.
Lisa: "Gena, did you hook up with that guy with the green lantern tattoo last night?"
Gena: "I was going to until he took of his shirt. He had a major Italian Bodystache."
A word, probably made up by Rammstein, which is commonly referred to as meaningless, but in an interview Rammstein stated that it's a synonym for lust and uncontrolled sexual desire. It could also be an abbreviation for "Bücken statt büffeln" (bending down instead of studying)
Till Lindemann screams the word Bückstabü in the Rammstein song "B********", which is tackles the topic of rape.