iyit Share definition Flag Iyit- Noun. (Iy-at). Someone so stupid that you cannot pronounce the full word correctly. Someone who is, by being, extreemely dumb. Carlos is such an Iyit. I heard he gets hit by cars on the daily. iyit by Cdar123 May 30, 2019 0 0 Get merch Get the iyit mug. Buy Now — $32.95 See more merch