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Fat Kid 'Fitness' Sickness 

commonly known as FKFS
-The effect when a fat (or relatively large) kid thinks that playing the wii will make you fit.
-may cause sudden attempts (from that fat kid) of actually being athletic when clearly their are not.
'wow nathan tottaly has Fat kid 'fitness' sickness (FKFS) he tryed to flex for some girls because he stayed up all night playing wii fit
Related Words
An excessive roll of fat around your midsection that resembles a series of popsickles, sticky and gross like when you leave them out too long in the summer.
The disgusting fatsickles on Tyra Banks make her unworthy of social yumminess.
Fatsickle by Sarah & Hannah July 24, 2007
A fatsickle is produced when a fat, bald, caucasian man sticks his black dick in a tray of ice to get a boner and to get the sweat off his dick to impress his "lady-friend" of the night, then he sticks his fatsickle in her.
"I have frostbite on my fatsickle; warm it up tang'"
Fatsickle by tankin355 October 29, 2007