A hitlerstache is a moustache which resembles the one which Hitler wore.

A style of wearing one's pubic hair in which the genetals are completely shaven except for a small square patch of pubic hair directly above the genetals; Thus bearing a resemblance to how Adolf Hitler styled his mustache.

The iconic moustache of Nazi leader Adolf Hitler.

Ruining something for everyone else like how Hitler ruined an entire mustache for the rest of the world.