It’s an adjective which can be used in a number of different ways:
1. Addicted to or characterised by
vice; grossly immoral; depraved; profligate.
2. Given or readily disposed to evil.
3. Reprehensible; blameworthy;
wrong.
4. Spiteful; malicious.
5. Unpleasantly severe.
6. Characterised or marred by faults or defects; faulty; unsound; unfit for purpose.
7. Savage; ferocious.