scab
scab. A person who works under conditions contrary to a union contract; esp., a worker who crosses a union picket line to replace a union worker during a strike. — Also termed strikebreaker; (in BrE) black-leg labor.
scab. A person who works under conditions contrary to a union contract; esp., a worker who crosses a union picket line to replace a union worker during a strike. — Also termed strikebreaker; (in BrE) black-leg labor.