A Moustache is a piece of facial hair grown on the upper lip.
History
In "Operation: S.H.A.V.E.", living Mustaches seemingly tried to take over the world by implanting themselves on people's faces and brainwashing their victims, making them obsessed with their mustache. They attacked and possessed Sector T in Texas. When confronted at an office building the mustaches had taken over, the leader of the mustaches explains that they only want to have a home on people's faces, having fallen out of style and shaved off by their previous owners. Numbuh 3 took pity on them, and Sector V had all the mustaches taken to the Antarctic and put on penguins.
Trivia
- They are similar to the DC comics villain Starro the Conqueror, in that they latch onto people's faces to control them.