What is the meaning of Throw-out?

A discard, rejection.

An item that is thrown out to an audience or crowd, usually for dramatic effect.

An overarm throw of the ball from a goalkeeper.

A put-out caused by a throw to a base of a fielded ground ball.

A folded paper in a publication, such as a book or a greeting card, that is intended to be unfolded for use outside the normal form factor of the publication.

A mechanism to rapidly disengage a portion of a machine from the source of its motion, as an automotive clutch.

Source: wiktionary.org