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Fucking Railroad Nut; used by railroad employees to describe those who watch and/or photograph trains. Usage has recently fallen off with "foamer" being used in many parts of the country instead
We saw a ton of FRNs stopped by the side of the tracks when the steamer was coming.
FRN by Schnauf April 15, 2006
Urban Dictionary Merch
Federal Reserve Note, a paper printed as to resemble official money, as opposed to gold or silver coin or a United States Note, ostensibly backed by gold and/or silver.
How many FRNs does that cost?
frn by Peter314 January 17, 2004
Related Words
Stands for "Face right now".
"Look at this picture of a cute cat. IS IT NOT CUTE?"
"frn -> :D"

"FML, we broke up. frn -> :C"
frn by Thisusernamewasalreadytaken August 23, 2011
Acronym for 'Free Ranged Nipple(s)'

A phrasal combination of #FreeTheNipple and Free Ranged Animal Activism - most commonly found with poultry products.
"My boobs are so small that they're nothing more than nipples"
"Might as well ditch the bra and go FRN then"
FRN by Vattify April 22, 2019
Abreviation of "For Real Now"
Friend 1: You know what?

Friend 2: What??

Friend 1: I saw a dinosaur

Friend 2: That's cap

Friend 1: FRN my crush asked me out!!!
FRN by XabiPellitero November 24, 2021
Favourites right now
my frn for music are: Brandon Flowers and Gerard Way. And I can't wait to see them live!!!!
FRN by IAMMOREOFAGHOSTTHANYOU June 2, 2015
Hey have you’ve heard of the new gang FRN.
FRN by Thatgirl16 June 5, 2020
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