Ish Share definition Flag -ish (suffix): Added to words or sentences to say that you did some action incompletely, or at least not to the questioners extent. Boss: Did you finish that report I asked you to?Worker: Yeah, totally. Ish. Ish by Barkalow May 4, 2009 0 0 Get merch Get the Ish mug. Buy Now — $32.95 See more merch