grand poobah
A person who is important or high-ranking.
He once played golf with the grand poobah of their company.
poobah
/ˈpuːbɑː/
noun 3
Definitions
noun
1
A person who holds multiple offices or positions of power at the same time.
2
A leader or other important person.
‘I said pooh-pooh,’ Duxmann Pooh Bah said.
3
A pompous, self-important person.
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