Deychish Share definition Flag A dialect of English spoken with a predominantly Russian accent and afflicted with horrendous grammar. "Oh my!" Exclaimed Joe. "I never knew that our teacher spoke Deychish." Deychish by Skaplan (who doesn't know me?) July 22, 2009 0 0 Get merch Get the Deychish mug. Buy Now — $32.95 See more merch