TWO-UP, TWO-DOWN
Meaning of TWO-UP, TWO-DOWN in English
ˌtwo-ˈup, ˌtwo-ˈdown BrE AmE noun [countable] British English
a small house with two rooms upstairs and two rooms downstairs
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012