fat cat

noun Slang.

a wealthy person from whom large political campaign contributions are expected.

any wealthy person, especially one who has become rich quickly through questionable dealings.

an important, influential, or famous person.

a person who has become lazy or self-satisfied as the result of privilege or advantage.

Origin:
1925–30, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To fat cat

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Fat cat is always a great word to know.

So is ninnyhammer. Does it mean:

a fool or simpleton; ninny.

the offspring of a zebra and a donkey.

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Collins

World English Dictionary

fat cat

—n
	slang
	a. a very wealthy or influential person
	b. (as modifier): a fat-cat industrialist

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Slang Dictionary

fat-cat definition

n.
someone with great wealth and the accompanying success. : I like to watch the fat-cats go by in their beemers.
mod.
having to do with wealth or a wealthy person. : You'll never see me driving any of those fat-cat cars.

Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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American Heritage

Idioms & Phrases

fat cat

A wealthy and privileged person, as in This neighborhood, with its million-dollar estates, is full of fat cats. This term originally meant "a rich contributor to a political campaign," and while this usage persists, it now is often applied more broadly, as in the example. [Colloquial; 1920s]

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