The term "middle finger" refers to the extended finger that is situated between the index finger and the ring finger on the human hand. It is often associated with an obscene gesture called "flipping someone the bird," where the middle finger is raised while the other fingers are folded down. This gesture is typically used to express anger, contempt, or offense.
The phrase "middle finger" originates from the Old English term "middela," meaning "middle," and "finger," which refers to the digits on the hand. The gesture itself has been used in various cultures throughout history as a sign of disrespect or insult.