1 definition by robbieD26

Ballymun Balloon

It is when you are having sex with your woman from behind. Then when you ejacuate into the condom you blow up the condom to the size of a balloon and surprise her by breaking it in her face and the semen goes everywhere.

I gave my girlfriend a great ballymun balloon last night. She was not a happy camper.

by robbieD26 February 6, 2008