nrb

no reason boner. when you get an erection for no logical reason.
a: why do you have your hands in your pockets when you could be playing catch with us?
b: nrb, man...nrb.
by phlipnrip November 30, 2009
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nrb

dude I was just sittin around and i got a nrb
by willdo 69 March 25, 2010
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nrb

No Reason Boner. When a stupid 12-year-old pops a chubby, and its really embarrassing for them, because no one can see the bulge cos they haven't hit puberty yet. And its really annoying when they just say NRB, like its a great joke, over and over and over again.
Stupid kid No.1: NRB
<<Stupid Kids erupt in giggles, not gut laughs cos their balls haven't dropped yet>>
Stupid Kid, like No.6: NRB.
<More annoying giggling>>
Angry Dan: SHUT THE FUCK UP YOU STUPID BALDY!
by Angry Dan May 15, 2004
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nrb

No Reason Boner, an "erection" psh lets just called it a frikin woody that occurs without reason or cause or any foreplay, psh lets just call it masturbation
I was just like sittin there dude, watching tv, when this chick sat on my NRB.
by sideswiper March 05, 2004
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NRB

Short for "No Reason Boner." Generally, an erection that has no inherent cause other than a young man's hormones going crazy. The term is usually used to clear sexual tension when other prepubescent boys notice a bulge originating in your crotch area.
"For Christ's sake Dave."

"heh heh...::nervous laughter:: talk about a NRB. I sure hope the 10th graders don't see me."
by desperryado October 04, 2005
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NRB

Noun. NRB ( No Reason Boner)
This is what all male humans experience spontaneously, occuring from the early ages of adolesence to even in some rare cases senilty. NRB can attack men unkowningly, silently, and suddenly causing possible embarassing situations or even discomfort.
Zach was wearing basketball shorts walking to third period when he suddenly got an NRB and caused laughter and jeering from students around him.
by Ktang March 30, 2006
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NRB

I was sitting in class when I got a huge NRB.
by Joey February 27, 2003
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