Noun
muckety muck (plural muckety mucks)
(US, colloquial) A high muckamuck; a person (especially self-important) in a position of power, authority, or status. [from 20th c.]
Synonyms: see Thesaurus:important person
muckety-muck (plural muckety-mucks)
Alternative spelling of muckety muck
muckety-muck