curve ball

(redirected from a curveball)

curve ball

1. In baseball, a ball that curves in its trajectory toward home plate. He's a good batter, but he has a hard time hitting a curve ball.
2. An unexpected occurrence or thing that causes confusion or uncertainty. I thought I had confirmed my hypothesis, so these results are a real curve ball.
3. A deceptive action or thing. I don't know, I think her sudden displays of affection are just a curve ball to get me to trust her.
See also: ball, curve
References in periodicals archive ?
In March, for instance, airports region-wide were thrown a curveball by the abrupt imposition of the laptop ban on flights to the US.
What are the main differences between a curveball and a fastball?
I did that research in the fall of 1974, and it made me realize I needed to have a curveball, something to throw to the first-base corner of home plate, because my screwball was a good pitch to the third-base corner of home plate, and my fastball was good to the third-base corner.
That is, to get the seams of the baseball to stay in the air about 70% of the time, instead of 12% as it does on a curveball.