Knuckleball definitions

(baseball) A pitch thrown with the ball gripped on the fingertips and released with no rotation which travels over an unpredictable path to the plate due to micro-turbulence in the air.

Even the pitcher doesn't know where his knuckleball is going.

Boston Red Sox pitcher Tim Wakefield is best known for his use of the knuckleball.

noun
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An event that is hard to predict.

Our vendor keeps throwing us knuckleballs.

noun
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(intransitive, baseball) To pitch knuckleballs.
verb
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