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!"
is a cross between bob and Testical, a name often given to one that has amazing super powers, and is mainly given to those special people who go by the wonderful name, Luciano!!!