nasty

Definitions
Examples

(noun): Something nasty.
(noun): (preceded by "the") Sexual intercourse.
(noun): A video nasty.
(adjective): Dirty, filthy.
(adjective): Contemptible, unpleasant (of a person).
(adjective): Objectionable, unpleasant (of a thing); repellent, offensive.
(adjective): Indecent or offensive; obscene, lewd.
(adjective): Spiteful, unkind.
(adjective): Awkward, difficult to navigate; dangerous.
(adjective): Grave or dangerous (of an accident, illness etc.).
(adjective): Formidable, terrific; wicked.

Processed foods are full of aspartame and other nasties.