whale
n.— «Lanni courts the casino’s best clients—”whales,” in industry parlance—taking semiannual trips to Hong Kong, Taipei, Shanghai and Singapore, where he hosts as many as three dinners in one night.» —“Harrah’s, MGM Mirage Duel for Supremacy on the Las Vegas Strip” by Adam Levy, Jeannine DeFoe Bloomberg.com Mar. 2, 2005. (source: Double-Tongued Dictionary)
Further reading
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There are eight major planets, but more than a million minor ones, including asteroids. If you discover one, you get the honor of naming it. The Dictionary of Minor Planet Names includes minor planets named for rock bands, jazz musicians, poets, and...