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FKM is an acronym which stands for "Fat Kid Mentality". Many people suffer from FKM - FKM affects every aspect of their lives. FKM sufferers NEED to do everything in excess. Whether it be ordering an extra cheeseburger with their Xtra Value meal or having psychotic munchies. FKM causes impulse buying, excessing horniness, drinking, smoking...excessing everything! Most FKM sufferers have little or no control over their lives.
(Noun) Look at Fatty over there, he's got a serious case of FKM! He had two McDonald's trays to himself!

(Verb) I FKMed a pound of cheese, some nachos and three burgers tonight.

(Verb2) I FKMed the shit out of girlfriend last night. She's gonna be sore today!
FKM by ShVR February 19, 2006
Related Words
FKM • FKMA • fkmatix • FKMAZZ • fkmerisben etare • fkmf • fkmn • Fkmrn • rufkm
Guy: yo I just took a upperdecker in your bathroom
Another guy: bro, fkm
FKM by Makeitrain888 April 13, 2011
Fkm now baby
Fkm by Audedeeeeee May 2, 2020

r u fkm? 

Shorthand (aka Tweethand or Texthand) for the emphatic incredulous query: "Are you fucking kidding me?"
Y: I couldnt get the food, bro', there was just too much traffic!
M: r u fkm? (with the car packed & ready for a trip up the coast.)
r u fkm? by wordphile0810 October 4, 2010
John "Bro we have a test next period"
Kenny "Aww I didn't study FKMS"
FKMS by Quite Awesome March 22, 2017
FUCKING KILL ME NOW.

Variation to ; FML (fuck my life).
Man, today has GOT to be the worst day ever. I my friends hate me, lost $350 & my dad died. FKMN!
fkmn by bananatree April 23, 2009
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