Urban Dictionary: rb

reply back not random boner

.......rb

by ninjamoolola July 16, 2019

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Jim tried to hide his RB by crossing his legs.

by Anonymous October 28, 2003

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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::

by DaniKidd November 10, 2007

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eg. on Snapchat YOLO ‘rb if ya not scared’

by lil TAZZz December 03, 2019

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Reason Boner: An erection developed from arousal; the antithesis of NRB (no reason boner).

"Dude, that chick gave me a huge RB!"

by Nicholas Run August 07, 2007

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1. rich bitch
2. random boner

Christina is a major rich bitch and gave Tony a random boner!

by . February 21, 2004

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Person 1: Dude ew look at that fat chick...

Person 2: Awww dude I just got an rb

by dfray69 July 23, 2010

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