Top Definition
When two or more people masturbate at the same time.
When I walked into the room RJ and Adam were tandem fapping to pictures of my mom again.
by Shanus teh Anus January 28, 2008
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.

×