adj

• (often sarcastic) Clever, making an apparently hard task look easy.
  "Our new process for extracting needles from haystacks is extremely slick."
• (US, West Coast slang) Extraordinarily great or special.
  "That is one slick bicycle: it has all sorts of features!"

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.
• (sports, automotive) 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."
• (US, military slang) A helicopter.
• (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.
  "The project was delayed because the slick had not been delivered to the printer."

adv

• (colloquial) Alternative form of sleek (“with ease and dexterity”).
  "We're just following a couple of crooks who've got slick away in that two-funnelled boat yonder, and we mean to keep in touch with them till they land."