factsious Share definition Flag Factsious a word from the Chinese Dicktionary used as a better way of saying facts or fact it’s more proper doper and just all around sick. Guy 1:Yo that girls booty is so good lookin Guy 2:FACTSIOUSSSSS!! factsious by nowaaloco November 13, 2020 0 0 Get merch Get the factsious mug. Buy Now — $32.95 See more merch