Fat Arm

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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fat arm

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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Fat girl arms

Fat girl with red spots on the skin above her elbow.

Man that bitch has some nasty fat girl arms!!!

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Arm Fat

The act of jiggling one's fat on the underside of the bicep area of their arm. This jiggling can also occur on the calves of their legs, Double Chin, Thigh, or stomach area.

"One moment, I must go arm fat that stranger over there."

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Fat Arme

When one arm is bigger than the other for an odd reason.

Person 1: Man quarantine was extremely long for real!
Person 2: I got a Fat Arme because of that extensive quarantine.
Person 1: How you get that?
Person 2: *Trollge*