spitballPronunciation: /ˈspɪtbɔːl/ North AmericanDefinition of spitball noun 1a piece of paper that has been chewed and shaped into a ball for use as a missile. 2 Baseball an unlawful pitch made with a ball moistened with saliva or sweat to make it move erratically. verb [with object] informal throw out (a suggestion) for discussion:I’m just spitballing a few ideasDerivatives spitballer noun spitball in other Oxford dictionaries Definition of spitball in the US English dictionary