porn arm 

An extremely swoll arm that has been shaped through excessive masturbation while watching porn.

Ex.1

Guy 1: Have you noticed John has a really strong left arm?

Guy 2: That's because his left arm is his porn arm

Ex. 2

This porno you gave me is giving me a porn arm.

porn arm by mr. bigglesworth III October 4, 2009

arm porn

Pictures/video of a man with well-developed arms while he is in a tank top/wife beater or shirtless. Came about in the CSI fandom after two CSI: NY episodes ("Trapped" and "Cool Hunter") which featured the character Danny Messer (portrayed by Carmine Giovinazzo) in a wife beater.

Amy: Did you see his arms? They're so...so...wow.
Susan: That's arm porn, honey. Want to watch it again?

arm porn by Ragna July 22, 2008

arm porn

A butch dyke in short-sleeves showing off very well-developed arms with well-defined muscles (but not steroid-type muscle).

Jenny: Your girlfriend has a really nice body. Her arms look really hot in short sleeves.
Carla: Oh yeah, I can barely stop myself from drooling. It's total arm porn.
----
Sam (Samantha): Babe, now that I've started bulking up, I'm thinking of getting a tattoo on my arm. What do you think?
Laura: Oh baby, that would totally give you arm porn.

arm porn by dosaguasdyke April 25, 2010

armpit porn

Ryan

Ryan loves armpit porn...

armpit porn by 1inch Wonder May 14, 2017

armpit porn

Ryan

Ryan loves armpit porn...

armpit porn by 1inch Wonder May 14, 2017