(as) sharp as a whip

(as) sharp as a whip

Very intelligent, clever, or quick-thinking. (A common but incorrect combination of the two phrases "sharp as a tack" and "smart as a whip.") Ted's as sharp as a whip, so he'll find a solution to this problem. Of course Ellen is our valedictorian—she's as sharp as a whip.See also: sharp, whip