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 3, 2019
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real bad
mostly used when you miss somebody
"i miss my man rb"
"im on this girl rb"
by therealmylove June 6, 2023
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Christina is a major rich bitch and gave Tony a random boner!
by . February 22, 2004
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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 8, 2007
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