Definitions from Wiktionary ( )

▸ adjective:  Slippery or smooth due to a covering of liquid; often used to describe appearances.
▸ adjective:  Sleek; smooth.
▸ adjective:  Appearing expensive or sophisticated.
▸ adjective:  Superficially convincing but actually untrustworthy.
▸ adjective:  (often sarcastic) Clever, making an apparently hard task look easy.
▸ adjective:  (US, West Coast slang) Extraordinarily great or special.
▸ noun:  A covering of liquid, particularly oil.
▸ noun:  (by extension, hydrodynamics, US, dated) 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.
▸ noun:  Someone who is clever and untrustworthy.
▸ noun:  A tool used to make something smooth or even.
▸ noun:  (sports, automotive) A tire with a smooth surface instead of a tread pattern, often used in auto racing.
▸ noun:  (US, military slang) A helicopter.
▸ noun:  (printing) 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:  (publishing, slang) A glossy magazine.
▸ noun:  A wide paring chisel used in joinery.
▸ noun:  (fandom slang) In omegaverse fiction, the copious, lubricating bodily fluid produced by an omega in heat.
▸ noun:  (slang) A silver coin that has been worn to the point it's surface feels smooth to the touch.
▸ verb:  To make slick.
▸ noun:  A term of address, generally applied to males, possibly including strangers, implying that the person addressed is slick in the sense of "sophisticated", but often used sarcastically.
▸ adverb:  (colloquial) Alternative form of sleek (“with ease and dexterity”) [(dated, colloquial) With ease and dexterity.]
▸ noun:  Alternative form of schlich [The finer portion of crushed ore, as of gold, lead, or tin, separated by the water in certain wet processes.]

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