Pooh-bah is an interesting term that has its origins in Gilbert and Sullivan's satirical opera, "The Mikado." It means a pompous or self-important person who holds several high-ranking positions. Antonyms for "pooh-bah" could include down-to-earth, humble, unassuming, or modest. These terms refer to individuals who are not interested in accumulating power or position for their own benefit. Instead, they focus on being kind and respectful towards others, regardless of their rank or status. The opposite of a pooh-bah could also be described as someone who is egalitarian, democratic or believes in equal rights, and treats everyone with respect and dignity.