no m8! Share definition Flag no m8 is the expression used when someone has spoken unjustly and is out of social verbal boundries and need to be owned. hey look this buddah has the face of jesus on it, thats ironic!.......NO M8! no m8! by Tom hubbard June 7, 2005 0 0 Get merch Get the no m8! mug. Buy Now — $32.95 See more merch
