zipper snipper

When the zipper in your pants cuts your dick off.

I was so hungover, I gave myself a zipper snipper

Cockenspieling

The art of playing of slapping your penis on the glockenspiel to create music.

"I love cockenspieling on a night out"

Sponge Knob

Sponge Bob's knob.

Patrick sucked on his friend's Sponge Knob