Curveball

Origin

curve + ball

Full definition of curveball

Noun

1. (baseball) A forespin pitch thrown by rotating the index and middle fingers down and resulting in motion down "curve"He bit on a curveball in the dirt.
2. An unexpected turn of events initiated by an opponent or chance.Life has thrown him a few curveballs.

Coordinate terms

• (baseball) fastball, hardball, slider, cut fastball, two-seam fastball, split finger fastball, sinker, screwball, softball, knuckleball