(Variations: muck-amuck or mucky-muck may replace muckety-muck) A very important person, esp a pompous one; big shot, higher-up: I'm gonna meet a couple of the high muckety-mucks at the university tomorrow
[1856+ Western; fr Chinook jargon hiu muck-amuck, ''plenty to eat,'' transferred to the important individual who has plenty to eat]