Wiktionary
n. A person in a position of power, authority, or status.
WordNet
n. an important or influential (and often overbearing) person [syn: very important person, VIP, high-up, dignitary, panjandrum]
Usage examples of "high muckamuck".
Carrying a bunch of regular slaves, but forward was a batch that were a gift from the Satrap of Jamaillia himself to some high muckamuck in Chalced.
Anyway, how by the high muckamuck are we going to make a balloon even if we could travel on one?
In the meantime, I've got a darned nice time here, high Muckamuck stuff you know.
If the receptionist could carry on in this fashion, it was more than likely that she held considerable sway with some high muckamuck on the Nemesis board of directors, possibly even the Dalai Lama himself.
I want some Lord High Muckamuck of the telephones to be at Lythe tomorrow bright and early and do what I tell him.
I think you're now the high muckamuck in charge of excitable Anglo broads around here.
Rumor had it that he was some high muckamuck from Moscow and the man solely in charge of preventing Czech incursions into Poland.
Some high muckamuck is supposed to fly up here and make a complete report for the government, but he hasn’.
One looked like a reasonably high muckamuck, his cape thatched in silver fish scales.