The phrase "most strutting" refers to someone walking with an excessive or boastful manner. Antonyms for this phrase could include the words humble, meek, modest, unassuming, and deferential. Individuals who are humble do not draw attention to themselves, show off their accomplishments, or dominate conversations. Meek individuals are characterized by their quiet, gentle nature, and unwillingness to assert themselves. The word modest refers to individuals who do not boast or exhibit ostentatious behavior, while the term unassuming describes someone who is shy, reserved, or does not seek attention. Finally, individuals who are deferential are submissive or respectful towards others, avoiding behaviors such as boasting.