Filthy Moustache Share definition Flag The act of trimming pubic hair off his/her genatal area and gluing it under the nose creating a filthy curly moustache. Brad was so drunk when he past out last night so I gave him a filthy moustache! Filthy Moustache by Rodney L July 27, 2011 0 0 Get merch Get the Filthy Moustache mug. Buy Now — $32.95 See more merch