Verb or Noun To Shoulder Bag is for one to announce their presence to a bar, party, or honestly any get together- by gently placing their ball sack on a friend's shoulder. Eventually the friend will feel the weight, sense a presence, or happen to glance, or see in their peripheral vision- a bag of balls connected to their friend.
Trish was not phased at all. Whilst recounting a hilarious story, she glanced down, noticed testicles on her shoulder, and nonchalantly announced, "Oh, Fronk is here." Her audience roared at the shoulder bag.
by Miss Dish April 2, 2018
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A clever way of getting away with the fact your sporting a man purse.
D- 40, "Look at that dork with the man purse"!

K-Rocc, "Thats not a man purse. Thats a european shoulder bag".
by K-Rocc November 3, 2009
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the sack that grows on ones shoulder. usually soft and enjoyable to play with.
hey Ash, touch my shoulder bag
by thatoneguywhoyouthinkiwas March 11, 2014
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