- a small ball or lump of chewed paper used as a missile.
- a pitch, illegal since 1920, made to curve by moistening one side of the ball with saliva or other slippery substance, as perspiration or petroleum jelly
- to throw out new ideas by engaging in spontaneous and unfiltered brainstorming: I’m just spitballing here, but I think we should ask the interns to test the product at home.Now that the film is in production, it’s too late to spitball an alternate ending.
