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.

Fat Arm by DaLumberjack June 18, 2008

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.

fat arm by Young Nak and Lil' Ash Ass October 23, 2006

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."

Arm Fat by TheNoseSucker March 14, 2017

Fat Armstrong 

A full-body Dutch Rudder, when a male friend assists you by placing his hands on the sides of your torso and thrusting you in and out of a girl.

Dude, I'm too tired for this... wanna help a guy out and gimme a Fat Armstrong?

Fat Armstrong by cliche_guevara September 14, 2009

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*

Fat Arme by FlareDaStriker April 27, 2022

Fat arming 

having 1 arm solely resting on the window sill when driving

"look at tat bloke Fat arming in that ute"

Fat arming by Scott_sporto the 1st August 27, 2025

fat-cow-armidillo 

a really fat ugly bitch.

shut up you stupid fat-cow-armidillo!!!!!!!!!!!!!!

fat-cow-armidillo by Blaze Hoskins December 14, 2009