Shartboil Share definition Flag Verb: To shartboil is to bring used undies, preferably nasty ass ones to a boil in some water in an attempt to clean them. Dude, did you just shart? Shit, i think i did that was juicy. Go shartboil those undies dude. Shartboil by Kurtor January 22, 2017 0 0 Get merch Get the Shartboil mug. Buy Now — $32.95 See more merch