Grand Poo Bah 

A Grand Poo Bah is any overbearing and pompous authority, often claiming numerous titles, roles or distinctions and frequently overplaying their hand. An overstuffed shirt. Someone who expects others to lick up to them for nothing. From a character in the 1885 Gilbert and Sullivan operetta The Mikado. Not to be confused with the Grand Pooh Bear, who is someone else again.

There's Larry again, trying to tell everyone what to do and swanning around like he's the Grand Poo Bah.

Grand Poo Bah by Fearman March 4, 2008

Grand Poo-Bah 

Someone with immense ego, and inflated self regard, who can often be found compensating for their small genitalia by driving a BMW or a Mercedes.

There's Larry again, trying to tell everyone what to do and swanning around like he's the Grand Poo-Bah of the whole place

Grand Poo-Bah by Hsgxjeo November 6, 2019

Grand Poo-Bah Hat 

A hat worn by the Grand Poo-Bah that is so distracting that there plot to take over the world goes unnoticed.

Brain always wears his Grand Poo-Bah Hat .
Pinky: What are we doing today Brain?
Brain: The same thing we do everyday Pinky"Try to take Over the World"

Grand Poo-Bah Hat by Elevatedthought July 11, 2015

Grand Poobah 

Is a title given to someone who holds an exalted position.
The name has come to be used as a mocking title for someone important or high-ranking and who exhibits an inflated self-regard.

"Fred Flintstone and his friend Barney Rubble were members of the Loyal Order of Water Buffaloes Lodge No. 26. A high ranking elected position within this organization is Grand Poobah or Grand Imperial Poobah. Poobah is a title of respect and often is linked to might in a role."

Grand Poobah by David Rowlands July 6, 2006

Grand Poobah 

to be a caring individual, loving each and every human being.
has many peaceful out looks on life, and is very philosophical about religion.
also a pedophile.

The pope is a grand poobah

Grand Poobah by RyuTheDestinedChild December 1, 2014