slick

1. A covering of liquid, particularly oil. · Careful in turn three — there's an oil slick on the road.· The oil slick has now spread to cover the entire bay, critically endangering the sea life.
2. A rapidly-expanding ring of dark water, resembling an oil slick, around the site of a large underwater explosion at shallow depth, marking the progress through the water of the shock wave generated by the explosion. (US, dated)
3. Someone who is clever and untrustworthy.
4. A tool used to make something smooth or even.
5. A tire with a smooth surface instead of a tread pattern, often used in auto racing. · You'll go much faster if you put on slicks.
6. A helicopter. (US, slang)
7. 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. · The project was delayed because the slick had not been delivered to the printer.
8. A glossy magazine. (slang)

Plural slicks