pooh-bah
From Longman Dictionary of Contemporary Englishpooh-bahpooh-bah /ˈpuː bɑː/ noun [countable] informal someone who is important or powerful – used to show that you do not respect them very much the pooh-bahs of the technology industryExamples from the Corpuspooh-bah• the pooh-bahs down at city hallOrigin pooh-bah (1800-1900) Pooh-Bah, character with the title "Lord-High-Everything-Else" in the operetta The Mikado by W.S.Gilbert and Arthur Sullivan