Self explanatory. Slapping someone in the face with a sandwich. The larger the sandwich, the better. Subs are preferred. For a cheap, tasty slap, head on over to Subway for a $5 foot long.
Girl: Look, that guy is eating a sub.
Guy: What an ass, I'm gonna go sandwich slap the shit out of him.
Guy: What an ass, I'm gonna go sandwich slap the shit out of him.
by blaylock December 07, 2009
Get the sandwich slapmug.