Y.R.M.T Share definition Flag A synonym for a large penis. An acronym for You'll Remember Me Tomorrow. GUY: "We had a decent time, so I banged her with my Y.R.M.T."DUDE: "How was it?"GUY: She'll remember me tomorrow. Y.R.M.T by Louie Flu July 22, 2012 0 0 Get merch Get the Y.R.M.T mug. Buy Now — $32.95 See more merch