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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Random Words:
1.
a noun form of w00t or w00tage
OMG, I li3kk S0000 Pwn3d ur n00b but7, TH@t W@$ a w00tification!..