The style in which a female trims her bush. Variations include but are not limited to pencil muff-stache(landing strip), handlebar muff-stache(well-styled), and Fu Manchu/Walrus muff-stache(needs attention).
Dude 1: What's with the lobster face dude?
Dude 2: I've got a mean rugburn from goin down on your mom last night. She needs to trim her *muff-stache...seriously dude.
*In this example, muff-stache could be substituted with Fu Manchu or Walrus.