crusty unker Share definition Flag Wearing pants for days repeatedly without underwear and throwing them in with the rest of the washing load, as if no one will notice. Dude jim pulled a Crusty Unker, now i need to wash everything again. crusty unker by Quellio August 28, 2006 0 0 Get merch Get the crusty unker mug. Buy Now — $32.95 See more merch