nabob

noun

1. (historical)An Indian ruler within the Mogul empire.

   “They have drained the treasuries of Nabobs, who must fill them by oppressing the industry of their subjects.”

2. (broadly)Someone of great wealth or importance.

   “Mr. Glentworth had never quitted Europe, and his wealth was either good English landed property, or equally undeniable English consols; still he was a stranger, very rich, and suddenly come from abroad. Such a man was necessarily a nabob in Mr. Palmer's eyes. India had been the place for making large fortunes in his young days.”

   “Private-equity nabobs bristle at being dubbed mere financiers. Piling debt onto companies’ balance-sheets is only a small part of what leveraged buy-outs are about, they insist. Improving the workings of the businesses they take over is just as core to their calling, if not more so. Much of their pleading is public-relations bluster.”

3. (broadly)A person with a grandiose style or manner.