A birth defect that occurs in both males and females which can be recognized as an uninterrupted line of hair above the eyes and nose, but below the forehead, that causes two eyebrows to become one.
If left untreated, this condition may prevent people from attracting members of the opposite sex, as well as members of the same sex.
You know that sweatstain that ladies get under their boobs? The sweat pours down the central boob canal, and out the sides in the underboob regions - thus forming the sweatstain in the shape of a mustache... aka, the Boobstache.
"yo, check out the handlebar boobstache on the girl on the elliptical."
"eh, I'm looking at the porn boobstache on the girl twerking out on the treadmill!"
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!
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.