Answer: walloper

AnswerCrossword Clue
WALLOPERDiMaggio, Musial, or Williams.
WALLOPERSomething huge or greatly exaggerated: Colloq.
WALLOPERDock-... (pier worker)
WALLOPERCleanup hitter, e.g.
walloperone who wallops (to beat soundly)