Tears Running Down My Cheek acronym. Used when something so funny is messaged to you, that you are in tears from laughing so hard. Usually from trying to stifle laughter.
Carly, "I had to leave the party after clogging the toilet. Meet you by the car..."
Chris, "TRDMC - I'm going to bust you on that one. Wait there...you'll be able to hear us laugh from the parking lot!"