25 Moby Thesaurus words for "fat cat": Daddy Warbucks, big cheese, big chief, big shot, big-timer, billionaire, bloated plutocrat, capitalist, heavyweight, man of means, man of substance, man of wealth, millionaire, moneybags, moneyed man, muck, mugwump, multimillionaire, nabob, parvenu, plutocrat, rich man, richling, warm man, wealthy man