poobah

/ˈpuːbɑː/

Etymology

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

noun

A person who holds multiple offices or positions of power at the same time.
A leader or other important person.“‘I said pooh-pooh,’ Duxmann Pooh Bah said.”
A pompous, self-important person.