Creeper 'stache 

Pronounced Creeper Stash. It is a thin, finely haired mustache, sported by all manner of sketchy men. It can be used as physical proof that a man is creepy.
Not all men with mustaches are creeps. However, creepy men stereotypically have mustaches like this.

Winnie: "I knew it from the start. I saw his Creeper 'stache, and I turned tail and ran."
Carla: "It's just such a puny, weak tuft of undesirable hair. Who in their right mind would want one?"

Creeper 'stache by RedFlagRedFlagRedFlag May 7, 2010

creeper-stache

A mustache that develops on adolescents who can't grow a full beard, giving the appearance of fuzz; which looks creepy, especially in a light colous.

"Yo, buddy, shave that creeper-stache off, you will never pick up chicks lookin' like that!"

creeper-stache by Stephie-poos December 17, 2006