curveball

Noun

 * 1)  A forespin pitch thrown by rotating the index and middle fingers down and resulting in motion down "curve"
 * 2)  An unexpected turn of events initiated by an opponent or chance; an exception or outlier.
 * 1)  An unexpected turn of events initiated by an opponent or chance; an exception or outlier.
 * 1)  An unexpected turn of events initiated by an opponent or chance; an exception or outlier.

Translations

 * Catalan:
 * French: balle courbe
 * German: Curveball
 * Japanese:
 * Korean: 커브볼
 * Portuguese: bola curva
 * Spanish: bola curva

Verb

 * 1)  To throw a curveball.