
The forkball is a type of pitch in baseball. Related to the split-finger fastball, the forkball is held between the first two fingers and thrown hard snapping the wrist. The forkball differs from the split-fingered fastball, however, in that the ball is jammed deeper between the first two fingers. The result is that the forkball is generally throw...
Found on
http://en.wikipedia.org/wiki/Forkball

A splitter or kind of split-finger fastball wherein the fingers are spread out to a high extent. The ball falls sharply and usually out of the strike zone, perhaps also into the dirt.
Found on
https://www.888sport.com/blog/glossary-sports-terms/glossary-baseball-terms

a pitch thrown with the ball inserted between the index and middle fingers, causing it to dip sharply near home plate.
Found on
https://www.infoplease.com/dictionary/forkball
No exact match found.