(US & Canadian) a labourer in a circus or fairground
Word Origin and History for roustabout
n.
"deck hand, wharf worker," 1868, perhaps from roust + about. But another theory connects it to British dialect rousing "rough, shaggy," a word associated perhaps with rooster. With extended senses in U.S., including "circus hand" (1931); "manual laborer on an oil rig" (1948).