Definitions of oily:

• adjective:   coated or covered with oil

  Example: "Oily puddles in the streets"

• adjective:   smeared or soiled with grease or oil

  Example: "Get rid of rubbish and oily rags"

• adjective:   containing an unusual amount of grease or oil

  Example: "Oily fried potatoes"

• adjective:   unpleasantly and excessively suave or ingratiating in manner or speech

  Example: "An oily sycophantic press agent"