Definitions of slick:

• noun:   a trowel used to make a surface slick
• noun:   a film of oil or garbage floating on top of water
• noun:   a magazine printed on good quality paper
• noun:   a slippery smoothness

  Example: "He could feel the slickness of the tiller"

• verb:   give a smooth and glossy appearance

  Example: "Slick one's hair"

• verb:   make slick or smooth
• adjective:   made slick by e.g. ice or grease

  Example: "Sidewalks slick with ice"

• adjective:   having only superficial plausibility

  Example: "A slick commercial"

• adjective:   having a smooth, gleaming surface

  Example: "Slick seals and otters"

• adjective:   marked by skill in deception

  Example: "A slick evasive answer"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #11305)