Sexual intercourse.
Something nasty.
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.
Synonym of bottom: a homosexual man who is penetrated or prefers to be penetrated during anal sex.
Used other than figuratively or idiomatically: see shirt, lifter.