having disproportionately large (yet lacking definition)arms as a result of excessive partying. Especially prominent in women more than two years removed from college.
Last night Corey banged that girl in the tank top; You know the one with party arms. Oh that's too bad.
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!