short for "fuck that noise in the ass" good for shooting down bad ideas. especially in mixed company.
idiot: wanna go to the poop chute tonight?
you: isnt that a gay bar? F that N in the A!
by J to the F U October 27, 2007
F is for friends who do stuff together! U is for you and me! N is for anywhere and any time at all down here in the deep blue sea! - Spongebob Squarepants
F. U. N Song
by Ur m. o. m June 21, 2021
Usually used in fanfics, F!Y/n stands for Female Your Name. Basically it is including you, fanfics with this in the title are made specifically for female readers.
Titles would say something like,

'*character name* × F!Y/N'
by Melody xox August 24, 2021
Stands for Friends that do stuff together, You (U) and me, and Anywhere and anytime at all down here in the deep blue sea.
Why hasn't this been made, even after a few years?
Guy 1: Hey, let's sing the F. U. N. song from Spongebob Squarepants!
Guy 2: No thanks.
by Supertrain12 December 25, 2019
Frequently used in rap music.

F&N refers to the firearm brand Fabrique Nationale Herstal, the gun company produces many guns including the FN Five-seveN®, and the FN P90®, among others, which pierce bullet proof vests.
F&N go pop-pop-pop-pop-pop
-Good Gas, Hauhwii
by Deinitialize September 20, 2020
a more polite way to use the work fcuk, taken from the slang of white people
leroy did you see that f n white girl over there she had an ass like a black girl.
by bert2 January 22, 2006
Abbreviation for Flip-n-Grip. An Asian massage parlor where you get jerked off at the end of the massage. Or after they are done rubbin' you down, they flip-n-grip. That is if they massage you at all...
Man, there was this fine ass little ho at the F 'n' G last night that blew my mind!
by Punkbrad May 17, 2006