Wall-stache 

A wall-stache is a mustache that either suddenly appears on one's wall or grows over a period of time. Wall-stache's are known to come in varying colors, shapes, and sizes, but the most common colors are brown and black.

Anyone who's wall is unable to grow a stache can obtain one simply by purchasing a fake mustache from a joke shop or costume bazaar. (caution, this fake stache on the wall will result in your wall losing any self respect and/or masculinity)

Me: Ah!, I've noticed that your wall has grown a handle-bar mustache.

Person who's abode I have entered: Yes, this is a rare Wall-Stache, they usually grow in stache colors of black and brown; not in the peppery tone mine has

Me: This is quite a feat your wall has accomplished.

Wall-stache by Sergeant Man-face Tinkleton August 4, 2009

Shadow O' Willstache

the result of Will's (from the Terrace) encounter with an unrelenting pair of scissors, rendering him 'stacheless, leaving only the mere shadow of his once formidable imperial moustache betwixt his rosy cheeks.

When Will shaved his moustache, he was left with a Shadow O' Willstache that made him look like a douchebag.

Shadow O' Willstache by Goddard April 13, 2008