Forgetful vegan Share definition Flag Someone who keeps forgetting that he is acting like he's a vegan.. The Forgetful Vegan...... "Man that sure was good pepperoni piz... Ahhh FUCK! - Zach Galifianakis Forgetful vegan by Yeahimcoollikethat November 10, 2010 0 0 Get merch Get the Forgetful vegan mug. Buy Now — $32.95 See more merch