knuckleball
/N AH1 K AH0 L B AO0 L/noun
- 1
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.
“Boston Red Sox pitcher Tim Wakefield is best known for his use of the knuckleball.”
- 2
An event that is hard to predict.
“Our vendor keeps throwing us knuckleballs.”
verb
- 1
To pitch knuckleballs.
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