cheesy mustache Share definition Flag a guy who's mustache has been dipped in the anus of a woman with a stinky asshole. "hey man did you smell rustys cheesy mustache..it reeked of cheese and bootyhole" cheesy mustache by BearLee February 21, 2014 0 0 Get merch Get the cheesy mustache mug. Buy Now — $32.95 See more merch