Thin arms on a man, usually on a wimp, showing that the wimp never works out, has never done a push-up or pull-up or lifted weights, has no bicep or tricep muscle definition. May be adept at playing video games, but does no physical exercise.
Check out the Pin Arms on that wimp on the beach, what is he even doing here, he's going to get laughed off the beach by those hot chicks over there....
by sarasplayroom.com July 12, 2009
Get the Pin Armsmug.