oily

Unpleasantly and excessively suave or ingratiating in manner or speech.

“an oily sycophantic press agent”

Smeared or soiled with grease or oil.

“get rid of rubbish and oily rags”

Containing an unusual amount of grease or oil.

“oily fried potatoes”

Coated or covered with oil.

“oily puddles in the streets”