This word is commonly mistaken for "Coin purse" which we all know refers to the sac of skin that encloses the testes and allows them to produce sperm and store it at a lower temperture to the body. Usually the result of a misunderstanding or a miscommunication.
me: would you mind shaving my coin purse?
me: Yeah, coin purse.
me: Coin purse.
you: wait... what?