spitball

/ˌspɪtˈbɔl/

Other forms: spitballs

Definitions of spitball

1. noun

   a projectile made by chewing a piece of paper and shaping it into a sphere
   type of:

   missile, projectile

   a weapon that is forcibly thrown or projected at a target but is not self-propelled
2. noun

   an illegal pitch in which a foreign substance (spit or Vaseline) is applied to the ball by the pitcher before he throws it
   synonyms: spitter

   type of:

   delivery, pitch

   (baseball) the act of throwing a baseball by a pitcher to a batter