fat cat

1 a wealthy person <that last recession was particularly hard on the poor, but the fat cats barely noticed a dip in their bank accounts> Synonyms Croesus, deep pocket, capitalist, have, money, moneybags, plutocrat, silk stockingRelated Words moneymaker, money-spinner [chiefly British]; magnate, nabob, tycoon; billionaire, gazillionaire, millionaire, multibillionaire, multimillionaire, multimillionairess, zillionaire; heir, heiress, jet-setter, jeunesse doréeNear Antonyms bankrupt, beggarAntonyms have-not, pauper

2 one of high position or importance within a group <a candidate that has the backing of most of the party's fat cats> Synonyms big, big boy, big cheese, bigfoot, biggie, big gun, big leaguer, big-timer, big wheel, bigwig, big shot, heavy, heavy hitter, heavyweight, high-muck-a-muck (or high-muckety-muck), honcho, kahuna, kingfish, kingpin, major leaguer, muckety-muck (also muck-a-muck or mucky-muck), nabob, nawab, nibs, nob [chiefly British], pooh-bah (also poo-bah), wheelRelated Words baron, czar (also tsar or tzar), king, lion, magnate, mogul, prince, tycoon; VIPNear Antonyms inferior, subordinate, underling; mediocrity, obscurityAntonyms lightweight, nobody, nonentity, nothing, shrimp, twerp, whippersnapper, zero, zilch