schooch

The act of incrementally moving, sliding or scooting one's derrière, buttocks or rear along when sitting on a sofa or bench, usually to make room for others to sit.

Probably derived from "scoot," which means "To move or slide to the side."

Brett, please schooch down a little so Aunt Dolores will have room to sit down.

by Joseph Poliakon December 30, 2004