8 letters · 13 points in Scrabble
noun a container designed to receive and transport and dump waste
originGenericized brand name, from blend of dump + Dempster. The original brand (and some associated things) are no longer trademarked, because the three trademarks involved have either expired or been cancelled. By surface analysis, dump + -ster.
Etymology from Wiktionary, CC BY-SA 3.0