frat house

 

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fraternity house

Wikipedia

• frathouse

Abbreviation of fraternity house

frat house (plural frat houses)

1. (US) A building in which the members of a fraternity reside or meet, especially one located on or near the campus of a college or university.
   • 1922, Willa Cather, chapter 9, in One of Ours:

     She wrote some awfully slushy letters to Phil Bowen, and he read them aloud at the frat house one night.

• chapter house, Greek house