Danger Jerkin' is the act of masturbating while being in a place where you could possibly be exposed or caught by friends or whoever.
"I was Danger Jerkin' in the alley way at night and didn't really expect to see anyone but I liked the idea of possibly getting caught and all of a sudden out of nowhere a homeless man approaches me and catches me in the act."
by publicdangerjerker#1 March 17, 2012