The section of the elite class in Washington D.C. who have moved from political or regulatory work to lobbying firms or think tanks, especially in foreign policy or on the behalf of corporations.
A large mass of relatively warm water in the Pacific Ocean off the coast of North America that was detected in 2013 and continued to spread throughout 2014 and 2015.
The Mafia: any particular mafia, mentioned uniquely within the discussion's established or implicit context, usually and especially the Sicilian–Italian–Italian-American one (especially in American English) but occasionally others (e.g., the Russian one, the Japanese one).
The masses, especially the 'great unwashed masses': the general population, or (yet more specifically) the rabble thereof, viewed as one mob of unruly, disorganized people predisposed to violence and malevolence.