Definitions

1. noun

a ball thrown with the spit, usually as a prank or in a game, especially in baseball

“The pitcher was accused of throwing a spitball to deceive the batter.”

2. verb

to throw a spitball, or to spit on a ball before throwing it

“The pitcher was caught spitting on the ball, and was ejected from the game.”

3. verb

to aim or throw something inaccurately or with little control, especially a projectile or a blow

“He spit the ball and it sailed into the stands.”