Top Definition
The act of rapidly assualting your sexual partner with your testicals, usually during a very rough period of sexual activity.
Sue : Hey Carrie, what happened to your face!?!
Carrie : Just between you and me, Bill gave me a Genital-Thunderstorm when I wasn't expecting it last night.
Sue : You have to watch out for those!
by Thoriail July 04, 2013

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×