1. most covered with or containing oil; greasiest
Usage: superlative form of oily
2. most excessively smooth or flattering in manner; most insincere
Usage: figurative use; often negative

Examples

• This is the oiliest fish I’ve ever cooked.
• The mechanic’s hands were the oiliest after working on the engine all day.
• That politician gave the oiliest speech I’ve ever heard.
• Of all the salespeople, he was the oiliest and least trustworthy.
• The oiliest part of the pizza was the pepperoni.
• Her oiliest compliments made everyone uncomfortable.