Smack On means to propose a fight with someone. Generally in a joking manner but can definitely can be used very effectively in a real situation. Smack On is closely associated with the term "punch on".
Joking:
Luke: "You suck apples"
Brad: "Smack on cunt"
Serious:
Josh: "I fucked your ex on a trampoline!"
Ryan: "Smack on cunt!"
Luke: "You suck apples"
Brad: "Smack on cunt"
Serious:
Josh: "I fucked your ex on a trampoline!"
Ryan: "Smack on cunt!"
by KinnyMcbinspin February 4, 2014
Get the Smack Onmug. by liv May 13, 2005
Get the smackmug. by Bigg Phill January 30, 2010
Get the smacks ofmug. by Sickyle January 28, 2003
Get the smackedmug. First invented (allegedly) by Dan Mace. Means let's get things done. A whole episode of 368 by Casey Neistat is titled after this phrase "SMACK IT."
by Amycrackpot May 28, 2018
Get the SMACK itmug. by Smack That June 10, 2014
Get the Smack Thatmug. 