Top Definition
MFN
short for "mother fuckin"
John: that guy was an MFN bastard
Billy: your damn straight
by faasgszgda July 27, 2009

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MFN
Short for "Motherfreakin'".

Pronounced letter-by-letter.
"Ugh, that MFN bitch killed me again!"
by MFNHO August 08, 2006

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Def: Slang; mother fuckin

Background: Danish, what danes would label friends who covet thy neighbors mother, used boat salesmen
whoppity mf'n do

I gotta take a mf'n dump. BAD.
by Mateo Rosita Jones January 08, 2005

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MFN
MOTHER FUKIN NIGGA
HEY YOU MFN COULD U PLEASE PASS THE CORN BREAD?
by UNDERPLOW October 18, 2010

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mfn
Magic Fucking Number.
The Maintenance Dept receives a call from production..

Production: This machine isn't working properly watch this.

The production operator hits a button and it starts magically fucking works.

Maintenance man: Another MFN.

Production operator: But this machine messed up 7 times.

Maintenance man: Oh, don't mind me, this is just another one of those cases where it runs right when you call me. 8th try's the c harm---talk about a magic fucking number.
by Simplistikk July 17, 2010

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MFN
A expression used instead of a typical curse word. Stands for "Mother F****** Nation" It is used to describe: People, places, events, etc... It can also be used as a verb. Originated at the Roger Williams University Campus in Bristol, RI.
"My electric bill is MFNing HIGH"
"MFN, I have to work"
"That man is MFNing me"
"The fact that two other definitions of this word exist is BIG MFN"
by Richard Williams April 22, 2007

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MFN
Stands for Mother Fucking Newbie.
Bob: "Hey, how's the new guy working out?"
Phil: "Just like all the other MFNs we have around here!"
by PicPrison November 24, 2007

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