throw someone out 1 expel someone unceremoniously from a place, organization, or activity. 2 Baseball put out a runner by a throw to the base being approached, followed by a tag. throw something out 1 discard something as unwanted. 2 (of a court, legislature, or other body) dismiss or reject something brought before it : the charges were thrown out by the judge. 3 put forward a suggestion tentatively : a suggestion that Dunne threw out caught many a reader's fancy. 4 cause numbers or calculations to become inaccurate : an undisclosed stock option throws out all your figures. 5 emit or radiate something : a big range fire that threw out heat like a furnace. 6 (of a plant) rapidly develop a side shoot, bud, etc.