1. Extremely or excessively particular, fussy, or hard to please; showing an extreme degree of fastidiousness about details, cleanliness, or standards.
Usage: informal; intensified form of fastidious

Examples

• Her hyperfastidious attention to detail made her an excellent editor, though her colleagues found her exhausting.
• He was hyperfastidious about the cleanliness of his kitchen, scrubbing surfaces multiple times a day.
• The hyperfastidious customer rejected three different hotel rooms before finding one acceptable.
• Their hyperfastidious standards for the project meant every element had to be perfect.
• She had hyperfastidious taste in music and would only listen to recordings from specific decades.
• His hyperfastidious nature made it difficult for him to enjoy casual dining experiences.