Top Definition
rb
Random Boner
Jim tried to hide his RB by crossing his legs.
von Anonymous 28. Oktober 2003
27 more definitions
rb
a rogue boner you receive at unexpected times

a surprise in your pants!
Dani: Josh you've got a huge rb!
Josh: Thanks for announcing it to the world! ::winks::
von DaniKidd 10. November 2007
Reason Boner

Derivitve: NRB; No Reason Boner
"Oh, dude! That chick's so hot. Kevin has such an R.B. right now!"

von jamesporter 6. März 2006
Rigorous Butt Sex-
1.Intense, mostly pleasurable but possibly painful(for either party) anal sex. Mostly used as a humorous example rather than an enticing possibility.
2.A fierce display of buttsexery
3.also Roast Beef Sandwich(how Arbys got its name)
(word origins attributed to Zeb)
"at first she was scared, but after I showed her how, she's been begging me for the R.B.S.

"You gotta have an ass of steel to handle my R.B.S"

"I thought R.B.S was cool til' the doctor had to sew up mysahara rip-dick"
von Senor lukas 10. Juli 2008
Also known as random boner syndrome. It is a condition where a male lacks control over his genitals. Also Known as a rock lobster.
Is that a banana in your pocket or are you just happy to see me. Nether is my R.B.S
von Allen Wynn 12. Juni 2010
RB
Short for Rat Bastard. Something you would call someone for pulling a shaddy or lame manuever. For example, taking credit for you work at your job.
You are such an RB, I can't believe you ate my last bagel.
von sdlakers 12. März 2010
RB
myRedBook (RB) adult entertainment community
I found this hottie from RB who blew my socks off!
von RB Fan 27. Mai 2008

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