The phrase "too big for britches" usually refers to someone who is overly proud of their abilities and accomplishments, leading them to behave arrogantly towards others. Antonyms for this phrase could include humility, modesty, and meekness. Humility means having a modest view of one's own importance and abilities, while modesty refers to the quality of not being too proud or confident about oneself. Meekness, on the other hand, implies being gentle, humble, and submissive. These are all traits that are the opposite of the negative connotations associated with being "too big for one's britches." People who possess these traits are generally well-liked and respected by others.