- a person who achieves social success or manipulates others through a calm, charming, and persuasive manner: I never know if he’s genuine or just playing me—he's a slick talker and smooth operator who gets what he wants.
- someone who performs a task with great skill and grace: This lawyer is highly recommended as a smooth operator—astute, personable, and committed to her clients' interests.
- something, such as a machine, computer program, etc., that is easy to use and runs flawlessly: Both engines are smooth operators, but the EX version of the car brings a little more pep to passing.
- a food or drink with a fine or mellow flavor, creamy texture, etc.: Our house ale is a smooth operator with robust flavors of molasses, caramel, and roasted malts.
