A play on the British game conckers, I which the two opposing players both swing a string with a chestnut on the end into each other, the first player who's chestnut breaks looses.
This rendition instead uses the opposing players testicles and/or ovaries, which are swung until one breaks, declaring the winner.
Me and my homies just played a sick game of cockers, but since were now down a player, want to join?