What is Fat Arm?
1.
To cruise down the street in your car with the window rolled down with you arm hanging out the window making your muscles look bigger than they actually are.
Let's go fat arm it down mendo.
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2.
A lesbian rower who is known to sleep with someones boy friend...also can be called ant farm or dykleznowkbi or horse face bird nose
Rachel is a fat arm.
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The Rhythm Guitarist For Avenged Sevenfold. He was born in Orange County, California on the 11th of December 1981. His Eyes are Green. Z..
1.
To occupy (especially through sexual activity) a hot chick's ugly friend so that your friend can score with the hot one
Hey, Kevin..