RB30

In line, fuel injected, six cylinder motor manufactured by Nissan in the late 80's for use in the R31 Skylines.
Also used by Holden in the inferior 'VL' series.

1) My RB30 has done 500,000 k's and is still going strong
2) I'm going to whack a huge turbo onto my RB30

RB30 by SKY031 September 5, 2003

RBI 

Rectal Ball Insertion. When a guy manages to get his testicle into a girl's rectum. To this day, there are no reported cases of the RBI.

We were getting bored with our normal routine, so last month I decided to go for RBIs.

It really, really hurt my balls but I got them in there. I'm up to 5 RBIs this season.

RBI by Daz Jenas December 18, 2009

rbm 

This word means "Raped By Men"

Tim's being rbm again.

rbm by Agustus Gibbins September 30, 2004

Random Big Nose Syndrome (RBNS) 

RBNS can occur on certain mornings where one wakes up and the proboscis staring back is visibly larger than the one from the night before. This phenomenon does not occur in any observable pattern but irritants are thought to be cameras and alcohol.
Upon diagnosis, one should treat with full Mr Potatohead mask, if not available large glasses or spending the day indoors is recommended.
Symptoms usually disappear within a day.

Nigel - "We had an amazing night...morning not so good. I woke up to her screaming and pointing at my face.
Jocelyn - "What was wrong?"
Nigel - "I ran to the bathroom mirror and realised I had a breakout of Random Big Nose Syndrome (RBNS)"
Jocelyn - "Unlucky"

Random Big Nose Syndrome (RBNS) by NigelBigNose March 18, 2010

Rbf 

Root Beer Float
Best dessert ever invented

Totally doesn’t mean anything else

“I really want a root beer float”

“Oh an RBF? Ya let’s make some!”

Rbf by pissjade September 25, 2021

rbn 

right bout now

BRO are you smashed rbn?

rbn by houndslax4 April 6, 2009

RBMD 

Raging Bull Mental Disorder

Dat f*ck nugget came at me like a retard with a rbmd.

RBMD by GimpyButtNugget June 15, 2012