Sentence:  [Mongo] refers to trash, or more specifically, to treasure found in trash: books, artifacts, furniture, even food. Ted Botha's book explores a whole culture, and various subcultures, that revolve around <WSD>mongo</WSD>. Those obsessed with <WSD>mongo</WSD> often live on the margins, ... 
Meaning of the word marked with <WSD> tags:  Still-usable things salvaged (by sanmen) from garbage. (since the 1970s or 80s)