dry as a nuns nasty Share definition Flag Very dry. A nuns vagina should be dry (supposedly) and therefore to say this means its very dry. "Hasn't rained in months, its as dry as a nuns nasty" dry as a nuns nasty by strtmvs January 12, 2012 0 0 Get merch Get the dry as a nuns nasty mug. Buy Now — $32.95 See more merch