Sin Muscle

What is Sin Muscle?

the muscle in the forearm which is used to masturbate (jack off)

Laura: Nice sin muscles! Haha!

Anthony: How do you know they're not from doing jazz hands!

See sin, muscle, forearm, masturbate, up, down, movement, jack, off

J.a.p.a.n

1. "Just Another Pretty-Ass Nigga" Acronym or phrase used to represent those kids living in areas around Japan- particularly the..

Laserbeam

1. A lovely word to describe ladies who love other ladies. Derivative of laserbeamage, meaning to partake in some laserbeam activities. Lo..

W3b

1. some one who eats there own cum or sucks at life jetcock: man i would hate to be a w3b stinks: yea i that would suck as hard as walt ..

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Sin Muscle Edit Meaning