Johnny Slapping 

The art of ejaculating into a condom then blowing it up like a balloon before creeping up behind an unsuspecting victim and bursting it in their face, hopefully covering them in your hot juice

Fred: "this guy was pissing me off yesterday so I ended up Johnny slapping him right in the chops"

Johnny Slapping by Benedict Maher March 10, 2009

slipping the johnny

inserting one's hand into one's pants and rubbing their genitals prior to greeting a fellow homie, player, bitch, or ho by the shaking or slapping of hands

oscar: dude who was that
kevin: oh that was that bitch fred
oscar: didn't he steal your fries last tuesady?
kevin: yeah
oscar: what did you do about it?
keving: before we shook hands i slipped the johnny
oscar: dude youre a fucking tard

slipping the johnny by steven bobeven March 31, 2005