slick

(noun): A covering of liquid, particularly oil.
(noun): Someone who is clever and untrustworthy.
(noun): A tool used to make something smooth or even.
(noun): A tire with a smooth surface instead of a tread pattern, often used in auto racing.
(noun): A helicopter.
(noun): A camera-ready image to be used by a printer. The "slick" is photographed to produce a negative image which is then used to burn a positive offset plate or other printing device.
(noun): A wide paring chisel used in joinery.
(verb): To make slick.
(adjective): Slippery or smooth due to a covering of liquid; often used to describe appearances.
(adjective): Appearing expensive or sophisticated.
(adjective): Superficially convincing but actually untrustworthy.
(adjective): (often used sarcastically) Clever, making an apparently hard task easy.
(adjective): Extraordinarily great or special.
(adjective): Sleek; smooth

Careful in turn three — there's an oil slick on the road.
You'll go much faster if you put on slicks.
The project was delayed because the slick had not been delivered to the printer.
The surface had been slicked.
His large round head was shaved slick.