Musty bacon Share definition Flag A musty bacon is when you fuck someone with a non showered most likely smelly Dong Jim: I just gave my girl a Musty bacon last night. Joe: Dude, KYS. Musty bacon by Muster Bester January 11, 2016 0 0 Get merch Get the Musty bacon mug. Buy Now — $32.95 See more merch