be as sharp as a tack
(redirected from are as sharp as a tack)be as sharp as a tack
To be intelligent and a quick-thinker. Ted's as sharp as a tack, so he'll find a solution to this problem. Of course Ellen is our valedictorian—she's as sharp as a tack.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.