bedsitter
noun
bed·sit·ter ˈbed-ˌsi-tər 
variants or less commonly bed-sitter
plural bedsitters also bed-sitters
British
: a one-room apartment serving as both bedroom and sitting room : bedsit
Ebury Street with its bedsitters, flatlets, small businesses, and round the corner a post-office, could not afford airs.
Patrick White
Patrick White
Example Sentences
Recent Examples on the Web Samson and Gregor moved their mother, the sofa, and whatever else out of Lotte’s ample apartment could be made to fit, into the bedsitter in the Hudson Valley. Adam Davidson, The New Yorker, 27 Feb. 2017
Adam Davidson, The New Yorker, 27 Feb. 2017 Word History
Etymology
bed-sitting room + -er (as in fresher freshman, rugger rugby)
First Known Use
1899, in the meaning defined above