A dumpster is a large steel waste receptacle designed to be emptied into garbage trucks. The word is a genericized trademark of Dumpster, an American brand name for a type of mobile garbage bin (MGB). Generic usage of dumpster is also common in Australia, although Dumpster is not an established brand there.
Read more about Dumpster: History, Function, Dumpster Diving, Dumpster in Popular Culture