IPA: //ˈraʊstəˌbaʊt//
KK: /ˈraʊstəˌbaʊt/
A person who does temporary or unskilled work, often in places like oil fields, circuses, or docks.
The roustabout worked hard to set up the circus tents before the show started.
Roustabout is derived from the combination of "roust" (from the dialectal English 'roust', meaning to stir up or rouse) and "about" (meaning in various directions or around). The term originally referred to a laborer or worker who would move about, often in a rough or unskilled manner, typically in the context of a circus or oil field.
Think of someone who is 'stirring up' ('roust') things 'around' ('about') — a roustabout is a worker who moves about and helps in various tasks.