A penis. Usually used to describe a penis that is used in questionable activities, such as 'rubbing it in' with an underage girl, or or all male group masturbation.
"I've got a ruler! Get your rub dogs, men!"

"I had this 16 year old girl petting my rub dog on saturday."
by Ωren October 08, 2008
slang term for a condom
I was about to roll some ass but I didn't have any rubdogs. I asked my buddy for one but he doesn't believe in using rubdogs.
by Q ballsy December 01, 2007

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.