poobah

• pooh bah, pooh-bah, poo bah, poo-bah, Poo-Bah, Pooh-Bah

From Pooh-Bah, a comic character in the Gilbert & Sullivan operetta The Mikado (1885), formed as pooh +‎ bah, both expressing contempt. Libretto by W. S. Gilbert, preceded by character Pish-Tush-Pooh-Bah (described as “haughty”) in “King Borriah Bungalee Boo” (1866), one of the Bab Ballads, with pish and tush other terms of contempt.

• IPA^(key): /ˈpuːbɑː/

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poobah (plural poobahs)

1. A person who holds multiple offices or positions of power at the same time.
2. A leader or other important person.
3. A pompous, self-important person.

• grand poobah

• dual mandate
• nabob
• tycoon