Mono-Ball 

Someone who only has one testicle, thus the name 'Mono-Ball'.

John: Bert has a Mono-Ball!

Mono-Ball by MaddaCheeb24 October 8, 2009

Monoballer 

A human male with the ability to fire ejaculate from one testicle per sexual climax, thereby allowing for shorter intervals between climaxes.

It's okay baby, I'm a monoballer. We can go again right now.

Monoballer by JBazzz April 17, 2008

Monoball 

When a persons balls havn't dropped and r still look like 1 ball

Jamie:George Olof has a monoball

Will:Lets make him cry and hide in his bathroom

Monoball by Jamie Elsworth April 30, 2005