ttylm Share definition Flag An acronym for "Talk to you later, man." Just an all around ballin way to sign out. "Sorry bro, I gtg! A fireball just blew up my entire block and my hot neighbour needs comforting!""Kcool. ttylm. ;)" ttylm by kungfulemon October 12, 2011 0 0 Get merch Get the ttylm mug. Buy Now — $32.95 See more merch