NRB 

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!

NRB by Axem Ranger June 13, 2008

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!

nrb by Angry Dan May 14, 2004

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.

nrb by sideswiper March 4, 2004

NRB 

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"

NRB by ben parry June 25, 2007

NRB 

(No reason boner) This occurs when you get a hard on out of nowhere. You may be sitting in class or hanging with your friends and BAM you have a huge hardon out of nowhere, and then your friend call you gay and leave you. A good way to get rid of these is think about something gross, like your grandma butt ass naked.

John: Hey hows it going man?
Jake: I got a huge ass NRB in class and ot was so embarrasing
John: Haha sucks to be you

NRB by TMan69 April 27, 2017

nrbous 

Derived from the "NRB" or "No Reason Boner", nrbous is adjective which describes the feeling associated with finding yourself in a public setting while experiencing a boner for no particular reason.

chris-"dude i was about to give a presentation when i began to feel a little nrbous"
ben-"what did you do?"
chris-"i belt tucked that shiz!"

nrbous by bjbarksalot February 3, 2008

NRBF 

NRBF is initials for "Not Real But Funny". Generally reserved for funny videos posted on any app like TikTok or online source like YouTube, made with the appearance of being candid or real, but rather is fake or staged.

TEXTING CONVERSATION:
"Hey man check this video out, haha"
"Haha NRBF"

NRBF by OhHeyIt'sBilly November 18, 2019