D.M. Share definition Flag abbreviation for Dick Move. Not in reference to actual penis movement, but refers to action made by impolite person causing another to take offense. Did you drink the last of my milk and leave the carton in the fridge? D.M., dude. D.M. by lowjoe March 11, 2009 0 0 Get merch Get the D.M. mug. Buy Now — $32.95 See more merch