An incorrigibly bad individual.
Unmanageable.
Defective and impossible to materially correct or set aright.
Impervious to correction by punishment or pain.
Determined, unalterable, hence impossible to improve upon.
Incurably depraved; not reformable.
An ugly person.
A member of an American nativist street gang that operated in the west side of Baltimore, Maryland, from 1854 to 1865.
Very ugly.