non fart day Share definition Flag Proceeding a shart for the rest of the day a person cannot fart for danger of repeating a shart. "Dude today's a non fart day" "How come?" "I sharted earlier man" "Ah, dude that sucks". non fart day by Sam "Ace" Rostein October 5, 2008 0 0 Get merch Get the non fart day mug. Buy Now — $32.95 See more merch