1. most inclined to nag; most persistently complaining or fault-finding
Usage: superlative form of naggy; informal

Examples

• She was the naggiest person in the office, always finding something to criticize.
• Of all his relatives, his aunt was the naggiest during family gatherings.
• The naggiest customers are often the ones who complain about everything.
• He became the naggiest roommate after finals week stress hit.
• The naggiest voice in her head kept telling her she wasn’t good enough.