Explanation:

- Lean and Mean: This idiom refers to being in a condition that is efficient, without any excess or unnecessary elements, ready to perform well. It implies being streamlined for optimal functionality.

- Fat and Lazy: Suggests a state of comfort and excess, often lacking motivation or drive.

- Evil and Selfish: Describes someone who is morally bad and only looks out for their own interests.

- Thin and Weak: Indicates a state of frailty or lack of strength.

- Ready and Efficient: Represents being prepared and optimized to handle tasks effectively. This is often associated with the idiom "lean and mean."