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1.
mfw
Abbreviation for "my face when
>mfw gerrard scored a goal against the us after 4 minutes
by unowiel June 12, 2010
 
2.
MFW
Abbreviation for "My Face When". Started as a way to respond to posts that a poster usually disagrees with in some manner, and is typically done to mock or troll said poster.

MFW utilize reaction images and are almost always green text
ANON: What do you guys think about my new Mac?

ANON 2: >MFW anon is now going to die of AIDS and cancer
by this fuggin guy February 28, 2011
 
3.
mfw
Stands for "My Face When". Some people will type a strange emoticon after or just leave it as mfw.
>mfw :U

>mfw people think this is a remix
by TrashednScatteredD January 09, 2011
 
4.
MFW
Abreviation for "My face when" This is commonly used on the forums of 4chan, in addition with green text stories. Usually, the picture is on the side of all the green text, and usually at the end, "mfw". It's particulary a meme face Ex.
Forever alone, Troll face, Y u no. etc.
>Sister embarrases me in front of friend
>Don't masterbate for 2 weeks
>Start fapping in the shower
>See my sisters bodywash
>Shoot a huge load
>mfw my dog smelling my sisters ass all day
Trollface
by x4nothingx September 09, 2012
 
5.
mfw
My fucking word, a play on "my word", an exclamation typically associated with the 19th and late 20th century upper class.
mfw, how much will that cost!?
by Almighty B January 13, 2013
 
6.
MFW
Acronym for : Mother fucking Win
P1: " Dude i just got excellence in my exam with no study!"
P2: "MFW!"
by anonnz September 14, 2011
 
7.
mfw
More fucking worse
Sam: Yeah last week was horrible, then today she made me sleep on the couch...

Alex: .... mfw man, best fix this
by BlackWite July 22, 2011