Nostradammit Share definition Flag An expletive used when one really should have known the shit would hit the fan. My car rolled down the hill and crashed into a storefront! Why didn't I use the parking brake?!... Nostradammit! Nostradammit by Wordsmithery June 30, 2012 0 0 Get merch Get the Nostradammit mug. Buy Now — $32.95 See more merch