What is Crank?

A crank is a rotating shaft that converts linear motion into rotational motion. Cranks are used in various applications, including bicycles, cars, motorcycles, and pumps.

The term “crank” can also refer to a person who is excessively enthusiastic about something, especially in a way that is perceived as annoying by others. For example, you might say your friend is a simple crank when discussing his favorite sports team.