Curveball

Meaning

An unexpected challenge or piece of news.

Usage

Used to describe surprises that require adaptation.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Baseball pitch that bends unexpectedly.

Popularized in the 20th century as baseball metaphors spread.