Visual meaning of 'curveballs'? - learn with images, example in daily life

Visual illustration of curveballs: A forespin pitch thrown by rotating the index and middle fingers down and resulting in motion down "curve"

noun

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."

sport technical

Visual illustration of curveballs: (by extension) An unexpected turn of events initiated by an opponent or chance.

noun

(by extension) An unexpected turn of events initiated by an opponent or chance.

"Life has thrown him a few curveballs."

event situation achievement sport business