In the Seinfeld season nine episode titled "The Maid", George Costanza tried to get his co-workers to give him the nickname "T-Bone". When a different co-worker gets the nickname, George throws a fit, yelling, crying, and flailing around with a banana in his hand. Because of this, George gets the nickname "Koko" in reference to the gorilla who was taught sign language. George's co-workers even give him a raglan baseball jersey with the name Koko on the back.

Seinfeld is one of the most popular sitcoms of all time, and everyone will know you are a fan when you wear this Koko Jersey Seinfeld T-Shirt!