A moustache that is thin, patchy and/or very ugly that makes the bearer of said moustache look like a mug
Teen 1: Look man I think I'm getting a moustache!
Teen 2: It looks shit, you definitely have a mug-tache
Teen 2: It looks shit, you definitely have a mug-tache
by Tom691738 July 18, 2018

the rash recieved when kissing a moustache-wearing person. 'tache' being an abrieviation for moustache.
by the tache-less December 21, 2010
