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

Simmon Fuller

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Ninjabate

1. Verb. To Masterbate with utmost stealthiness, similar to that of a ninja. Spirited Away was such as shitty movie, I had to whip it out ..

Pulled Off A Kumar

1. 1. cancelling an appointment in the last moment. This expression is used by the new age teenagers in the state of Selangor in Malaysia...

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Sin Muscle Edit Meaning