jumper
Someone or something that jumps, e.g. a participant in a jumping event in track or skiing.
Other meanings
A person who attempts suicide by jumping from a great height.
A short length of electrical conductor, to make a temporary connection.
Where this comes from
This definition is adapted from “jumper” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.