sharp cookie(redirected from one sharp cookie)
A particularly smart, witty, or clever person. Dan: "I'm having a heck of a time doing my taxes, I just don't understand it at all." Steve: "You should get in touch with my uncle, he's one sharp cookie!" We're always looking to hire sharp cookies like you.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.