person who holds several influential administrative positions; arrogant commander, one who exaggerates about himself (like the character in the operetta "Mikado")
someone who is important or powerful - used to show that you do not respect them very much (Pooh-Bah, character with the title "Lord-High-Everything-Else" in the operetta The Mikado by W.S.Gilbert and Arthur Sullivan)
If someone pooh-poohs an idea or suggestion, they say or imply that it is foolish, impractical, or unnecessary. In the past he has pooh-poohed suggestions that he might succeed Isaacs. to say that you think that an idea, suggestion, effort etc is silly or not very good (pooh)
a famous book for children by A.A. Milne, about a boy called Christopher Robin and his teddy bear Winnie-the-Pooh, who is also called Pooh or Pooh Bear. Pooh is not very clever or brave, but he is very happy and helpful and has lots of friends, including Eeyore, Piglet, and Tigger. He likes inventing songs and poems and his favourite food is honey (1926)