Nastier meaning : Dirty, filthy. Contemptible, unpleasant (of a person). Objectionable, unpleasant (of a thing); repellent, offensive. Indecent or offensive; obscene, lewd. Spiteful, unkind. Awkward, difficult to navigate; dangerous. Grave or dangerous (of an accident, illness etc.). Formidable, terrific; wicked.