Definitions by Numbercruncher

Party arms 

Well-defined biceps that nicely fill out the sleeve of a t-shirt or short sleeve shirt. These arms can be seen anytime of the year but are prominent in summer and warmer climates.

Note: This type of arm is often displayed while wearing a tank top or completely shirtless.

OMG, the sight of his party arms make my asshole moist!

Party arms by Numbercruncher July 22, 2012