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1.
The act of placing a mans ball sack on the shoulder of another person, while that person yells at his erect penis. Once this act commences, they may not stop until the man ejaculates.

Once this move is completed YOU MUST tell everyone you know even strangers on the street.
When you hook up with a random at a bar, you take him/her home and perform this amazing sex move. You first get an erection and place your balls on her shoulder while she yells at it. This is a shoulder shout.
by Officer Sexual #69 January 17, 2010