1. most smooth and slippery
Usage: superlative form of slick
2. most skillfully clever or cunning
Usage: superlative form of slick; often implies deception
3. most polished and professional in appearance or performance
Usage: superlative form of slick

Examples

• The ice rink was at its slickest right after the zamboni finished.
• He was the slickest salesman in the company, able to convince anyone to buy.
• The oil spill made the road surface the slickest it had ever been.
• She gave the slickest presentation of her career.
• That was the slickest con job I’ve ever seen.
• The magazine featured the slickest photography and design.
• After the rain, the marble steps became the slickest part of the building.