noun a lavatory; also used in a figurative sense. From the Italian casa (a house) which is also its original use. Many slang words have alternate spellings but users of the karzy have more choices than most: 'khazi'; 'kharzi'; 'kharzie'; 'kazi'; ' karsi'; ' carsey'; 'carsie'; 'carzie'; 'cawsey'; 'cawsy'. The variations spelt with a 'k'date from the mid-C20. Brendan Behan, Borstal Boy, 1958, uses 'cawsy' UK, 1961