6 ms·Me to OP: what's on?by actionscripted 13y agoMe to OP: what's on?moomin 13y agoIt's a term for "I'm going to fight you."drivers99 13y agohttp://www.urbandictionary.com/define.php?term=It%20is%20on http://www.urbandictionary.com/define.php?term=It%20is%20on "This phrase is used after a bet has been made."