Top Definition
when someones arm has too much excess fat/blubber that when arms are in certain positions it forms a round shape in the middle of the arm imitating a bicep.
fatceps can also be located under someones arm
dude how long did it take to get that fatcep?
about 3 reps of rice krispies and cake

fatceps are the kankle's cousin
by xfuckstick December 02, 2008

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