F N R 

Fuck 'N' Run

It's simple. You meet someone who is under the influence, engage in sexual activities, then get the hell out!

Guy 1: After I did a grandma loot, I went the club, picked a nice piece of pouthang, then I pulled an F N R.

Guy 2: That's what it's about man.

Guy 1: Chyeah

F N R by Skulze June 24, 2009

F.N.R.B. 

For No Reason Boner

Used often when one wants to discreetly express the fact that he is currently experiencing a boner for no apparent reason at all.

Dude 1: They just called your name... go get that diploma.

Dude 2: Shit. I don't know what to do. I've got a F.N.R.B.!

Dude 1: Ouch. Bad timing

F.N.R.B. by Worldwide Thugs September 14, 2006

H.O.F.N.R. 

Hard on for no reason, getting happy in the pants without stimulation

"I was sitting in class when I got a massive HOFNR

H.O.F.N.R. by Joe Beals May 13, 2005

F.N.A.R

1) Fnar, abbreviation for "For No Apparent Reason"

2) A character in the comic "Jack" (by David Hopkins) at www.pholph.com

1) Then he dropped over dead fnar.

2) Fnar is innocent and unaffected by Hell.

F.N.A.R by Horza August 4, 2005

F.N.A.R

Acronym: For No Apparent Reason

....fnar

F.N.A.R by Ender November 4, 2003

H.A.B.F.N.A.R.

Have A Boner For No Apparent Reason

Is used to signal to anyone else who knows the term that you have wood for no reason. "Hey, H.A.B.F.N.A.R., right now!" (while in a room full of unknowing people)

H.A.B.F.N.A.R. by Michael Roarty April 3, 2007

R.N.F.R.

acronym for Rock N Fuckin Roll

Fuck you if you think the Ramones aren't punk, they are so R.N.F.R. they make your fucking grandma get up and punch you in the face.

R.N.F.R. by whatsuprockers July 21, 2010