pugnasty Share definition Flag Of or pertaining to being nasty or disgusting. A simple mix of pugnacious (meaning aggressive or rough) and nasty. Only used when something is viciously gross. Uh! That medicine is PUGNASTY!! pugnasty by Tokeela April 25, 2007 0 0 Get merch Get the pugnasty mug. Buy Now — $32.95 See more merch