The indentation in a woman's skin, usually below and between the breasts, made by a tight, underwire bra. This indentation can sometimes resemble a mustache.
I took my girl's bra off and couldn't help but laugh at her brastache!
The visible panty line that is formed on the backside of a pair of fullback (granny) panties by the gusset stitching, going from one butt cheek to the other.
Oh man, every time that Nancy bends over when in her yoga pants, you can see her bumstache!
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 Wolverinebasedblog 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.