flophouse /ˈflɒphaʊs/noun 1verb 1forms 3 noun1 •(US, slang) A cheap hotel or boarding house where many people sleep in large rooms.In one of [Cincinnati’s] slum districts stands the Silver Moon, a “flop house” (i.e., a house where the occupants are “flopped” out of their hanging bunks by letting down the ropes). — 1904 verb1 •To stay in a flophouse.August was aware of Robert's strange quirk of flophousing away from home and that he often spent weekends at the Diana. — 1941 formsflophoused · flophousing · flophouses