Ding dong kung-fu

A form of martial arts only seen in the shady parts of Beijing or in triad controlled China town. It is also used as a sport for betting and such like.

Where 2 or more men use their erect penises as weapons in a duel but also doing those crazy kung-fu flips. Women can participate with strap-ons but this provides a distinct advantage due to their artificial nature.

Joe: 'Chris are you ok?'

Chris: 'No mate, absolutely exhausted. My penis is black and blue from all that Ding dong kung-fu!'