1. most concerned with small details or minor problems; most particular or demanding about standards
Usage: superlative form of fussy

Examples

• She’s the fussiest eater in our family and won’t try new foods.
• My grandmother is the fussiest housekeeper I know.
• He’s the fussiest dresser at work, always adjusting his tie.
• The fussiest customer complained about every small detail.
• Even the fussiest critic praised the restaurant’s service.
• She became the fussiest about cleanliness after having a baby.