Dan had a huge NRB when he was in bio class while the professor was talking about meosis.
by Andy Kuy January 28, 2008
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A shit gang based in north london in the holloway side of north london they are known for robbing and attacking civillians
Damn I hate NRB they dickride ActiveGxng
by Meek it’s January 20, 2022
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Man I was ridding down the street bye my self and all of a sudden I got an NRB
by Spencer2 July 9, 2007
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no reason boner!
when you get a woody, and there is no damn reason why
chris: it was prolly an NRB
me: its okay i understand
chris: it was prolly cuz u were there
me: oh fareal?!?!??!?!
by realrap October 12, 2007
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No Reason Boner that occurs in the worst time happening by the second
GUY 1: Dude I got the biggest bonner in the whole fucking world for no reason!

GUY 2: Thats called an NRB jackass and everyone in the classroom can notice!
by Axem Ranger June 13, 2008
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Its when you wake up in the morning with a no reason boner/erection.
Man 1 wakes up:" Aw man i got a NRB
Man 2: "looks like you wont be up for a while"
by ben parry June 4, 2007
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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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