johnstache 

The fandom's nickname for the moustache of Dr. John Watson, which appeared briefly at the beginning of BBC Sherlock's third series. During 'The Empty Hearse' several jokes are made about the Johnstache, until eventually John shaves it off, famously saying "I don't shave for Sherlock Holmes!"

Johnstache ate my ham.

johnstache by Consulting Criminal 2014 January 25, 2014

jahstache 

It's like a moustache, only more reggae.

12 Cents for Marvin rocked the jahstache on their B-Load album.

jahstache by 12 Cents August 1, 2007

jokestache 

A novelty. When someone grows a mustache as a joke.

Nick, your jokestache is filling in nicely.

jokestache by Krick Crammin August 5, 2008