Yann Share definition Flag The most intelligent man alive. He is nice, mature and lit AF; When u see him u think he's fat and shy, but meet him u will see the best of the best. Yann is smart a man. Yann by LitAF BOI14 April 3, 2017 0 0 Get merch Get the Yann mug. Buy Now — $32.95 See more merch