Something nasty.
Sexual intercourse.
A video nasty.
Spiteful, unkind.
Grave or dangerous (of an accident, illness etc.).
Contemptible, unpleasant (of a person).
Awkward, difficult to navigate; dangerous.
Dirty, filthy.
Indecent or offensive; obscene, lewd.
Formidable, terrific; wicked.
Objectionable, unpleasant (of a thing); repellent, offensive.
A toxic substance found in the venom of poisonous snakes.
A supposedly identical toxic substance obtained by cleavage of an albumose.