roustaboutPronunciation: /ˈraʊstəbaʊt/Definition of roustabout noun an unskilled or casual labourer. a labourer on an oil rig. North American a dock labourer or deckhand. North American a circus labourer. Australian/NZvariant spelling of rouseabout.Origin: mid 19th century: from the verb roustroustabout in other Oxford dictionaries Definition of roustabout in the US English dictionary