/ Dictionary / Index F fat cat: Meaning and Definition of Find definitions for: fat' cat' Pronunciation: [key] — Slang. Slang. a wealthy person from whom large political campaign contributions are expected. any wealthy person, esp. 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fatbody fat cell Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language