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Noun: high muckamuck
Usage: N. Amer
  1. An important or influential person; someone of high rank or holder of an important office
    - very important person, VIP, high-up, dignitary, panjandrum
Noun: high-muck-a-muck  'hI,mú-ku'múk
Usage: N. Amer, informal
  1. An arrogant or conceited person of importance
    - pooh-bah

Derived forms: high-muck-a-mucks, high muckamucks

Type of: important person, influential person, personage