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Similar to gaydar, but differs in the way that it allows you to detect a fatty before they have a chance to sit on and/or eat you.
Whoa! Look at that butterbeast. My fatdar is going crazy!
fatdar by JB April 2, 2004
Related Words
One who is exceptionally fat and exceptionally stupid.
"Gawd, that fat Debbie is such a fattard."
fattard by Screamadelica March 3, 2007

fatarded 

a combination of the words "fat" and "retarded"; an adjective describing a fat, stupid person
Jeanette is completely fatarded.
fatarded by Dr. J1221 April 21, 2009

fatarted 

When somebody is fat, overweight, or obese and they are dumb, retarted or just plain fucked up. You can use this terminology
Shut the fuck up Mary your fatarted
fatarted by Rikesh Patel July 1, 2006
The ability to sniff out discrete farts.
I tried to sneak one out but her fartdar caught me.
fartdar by Patpatriot January 22, 2015

FatFartMilkFart23 

Roblox.... more fiber.... more....more fiber....more josh more josh more josh
My balls be itchin like a fatfartmilkfart23