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knuckleball

play
noun knuck·le·ball \ˈnə-kəl-ˌbȯl\

Simple Definition of knuckleball

  • baseball : a pitch that is thrown with very little spin by holding the ball with the knuckles or fingertips

Source: Merriam-Webster's Learner's Dictionary

Full Definition of knuckleball

  1. :  a slow baseball pitch that moves erratically and unpredictably and that is thrown with little spin by gripping the ball with the knuckles or the tips of the fingers pressed against the top

knuckleballer

play \-ˌbȯ-lər\ noun

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