DKY Share definition Flag An acronym for "Don't Kill Yourself"; Used in situations where a dose of reality is needed; to show that the problem at hand is not as bad as it seems. "I'm sorry you failed your driver's test, but DKY. There's always next time." DKY by K. Com. December 31, 2009 0 0 Get merch Get the DKY mug. Buy Now — $32.95 See more merch