Fuckass Share definition Flag Is a combination of fuck and ass basically, the meaning of this word is saying someone is stupid or acting stupid or saying that’s stupid, you know ? Shalimar: *does something stupid* Yanna: Bitch you acting fuckass rn sit tf downfuckass 🤠👊🏽🔪😔😤 Fuckass by rcdvn September 29, 2018 0 0 Get merch Get the Fuckass mug. Buy Now — $32.95 See more merch