pickiest
Pickiest is the superlative form of the adjective picky, used to describe someone who is extremely selective or difficult to please in matters of taste, standards, or preferences. It is commonly applied to people, but can also refer to situations or criteria that are unusually stringent. The term often emphasizes a high degree of discernment in areas such as food, clothing, services, or performance.
Etymology and form: Picky is informal English dating from the 19th century, meaning fastidious or particular.
Usage: Pickiest tends to describe people, though it can describe standards or requirements. It implies a greater
Examples: She is the pickiest diner in town, insisting that every dish be prepared to exact specifications.