Middle finger

The middle finger (also called the long finger or the tall finger is the third finger on the human hand. It is between the index finger and the ring finger. When people study anatomy, they call the middle finger the "third finger", "digitus medius", "digitus tertius", or "digitus III".
Sometimes the middle finger is used as an insult or to offend someone. When it is extended, usually by itself, it is known as "giving the finger", "flipping the bird", or"flipping someone off".