Grand Poobah is a term derived from the name of the haughty character Pooh-Bah in Gilbert and Sullivan’s The Mikado (1885). In this comic opera, Pooh-Bah holds numerous exalted offices, including
“First Lord of the Treasury,
Lord Chief Justice,
Lord High Admiral…
Archbishop of Titipu,
and Lord High Everything Else.”
The name has come to be used as a mocking title for someone self-important or high-ranking and who either exhibits an inflated self-regard or who has limited authority while taking impressive titles.
Roy H. Williams is the Grand Pooh-bah of Wizard Academy.
He is also my boss.
…and I am in so… much… trouble.
Poofy Guy on a Short Leash, by James Christensen