1 definition by legab

Top Definition
Stands for Roast Beef Insertion. It indicates any type of penetration or sexual act.

Also: Baseball. Runs Batted In.
-Ayo, you see Trina?
-Did I see her? I musta got like 4 RBI last night!
by legab April 27, 2009

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.