/ˈnaː.sti/
noun
Something nasty.(preceded by "the") Sexual intercourse.A video nasty.adjective
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.