busser
n.— «A “bust-down” (pronounced “busdown,” and sometimes abbreviated as “bussy” or “busser”) is a woman of loose morals (although my students would define it by using graphic examples of what such a woman does). Such women (and men) are sometimes also said to be “runnin’” or to be “runners.”» —“Teaching on the South Side: Language” by Christopher Christopher’s Windy City Weblog (Chicago, Illinois) Feb. 21, 2005. (source: Double-Tongued Dictionary)