THROW IN

{v.} 1. To give or put in as an addition; to give to or with something else. * /John threw in a couple of tires when he sold Bill his bicycle./ * /Mary and Tess were talking about the prom, and Joan threw in that she was going with Fred./ Compare: FOR GOOD MEASURE. 2. To push into operating position. * /Mr. Jones threw in the clutch and shifted the gears./