(organic chemistry, medicine) The arsonic acid (4-acetamidophenyl)arsonic acid formerly used to treat syphilis and trypanosomiasis

(organic chemistry) Any salt or ester of arsanilic acid

(Britain, vulgar) Britain standard spelling of asshat.

(obsolete) A schoolmaster.

Alternative spelling of whoop-ass

An ancient city

plural of arsanilate

plural of arse end

A soft and waxy allotrope of arsenic.

(Britain, idiomatic, vulgar slang) To fail completely. / (Britain, idiomatic, vulgar slang, of a comedian) To be very poorly received by an audience.