Hummer house
n.— «A new generation begins to shun those wasteful Hummer houses. You know the houses I’m talking about—soulless, super-sized suburban dwellings (otherwise known as McMansions, or starter castles) with multiple gables, gymnasium-like Great Rooms, stratospheric ceilings and baronial dining rooms.» —“Dreaming of a world of Not So Big houses” by Whitney Gould Journal Sentinel (Milwaukee, Wisconsin) Dec. 5, 2004. (source: Double-Tongued Dictionary)
Further reading
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