The term TYPE OF SHIRT OR PONY can be answered with the four letter word POLO. A POLO shirt is a type of shirt that is usually made of cotton, has a collar, and typically has two or three buttons at the neckline. It is often referred to as a 'golf shirt' because it is commonly worn on the golf course. The term can also refer to a type of pony, which is a small horse breed that is known for its agility and speed.