high muckety-muck(redirected from a muckety-muck)
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slang An especially important, influential, and authoritative person, especially someone who is overbearingly or arrogantly so. We're just waiting for the muckety-muck to give us the green light before we get the project started. "All hail the high muckety-muck," Jerry muttered under his breath as the dictator's motorcade rolled by.
See also: high