The phrase "nickel and dime" has its roots in American slang, referring to a small, insignificant amount of money. The antonyms for this phrase are more commonly used in British English, where the equivalent phrase is "top dollar." Antonyms for "nickel and dime" include "lavish," "luxurious," "extravagant," and "opulent." These words convey the idea of something being expensive, high-end, and valuable. The opposite of a nickel and dime operation would be a business or activity that prioritises quality, comfort, and attention to detail, without cutting corners or being penny-wise and pound-foolish.