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A "spitball" in baseball is a pitch delivered after the ball has been moistened with saliva or sweat. This technique, used to make the ball drop sharply at the plate, was outlawed in 1920. However, pitchers who were using it at the time were allowed to continue until they retired.12

The term "spitball" also refers to a paper ball rolled into a ball to be thrown as a missile, and figuratively, to suggest ideas, especially those that are jocular, improbable, or impractical.13

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