san man
n.— «The impetus came from Ms. Nagle, who has long been fascinated by the Sanitation Department.…One of Ms. Nagle’s main concerns is the invisibility of “san men” as they are called, the ways in which people look past them, almost straining to ignore their work. » —“Nothing’s Wasted, Especially Garbage” by Edward Rothstein New York Times Mar. 31, 2008. (source: Double-Tongued Dictionary)