Comes from the words (Smurked) and (Murked). Originated in Nottingham, the amazing word means to kill someone by Hitting your penis on a persons cheeks.
1|Yo, i accidnetly killed ma m8
2|how?
1|I Smurked him
2|Erghhhh
When you go to take a dump in a "Port-a-John" type toilet and it has been recently cleaned and you get a splash back that gets the blue liquid all over your ass and balls.