- noun the meat of a mature sheep, produced from older sheep such as ewes which are finished for breeding
- The meat of sheep older than one year but nowadays over two years. The meat is darker and stronger-flavoured than lamb and was preferred in Victorian times. Most mutton sold today is from old breeding ewes killed at 3 to 5 years and is generally tough and only suitable for boiling. The best mutton, now difficult to find, is killed at 18 months and is more expensive than lamb.
- noun an em or width of type equivalent to 12 points, taken as the width of a capital M
- adjective deaf. Rhyming slang, from the cartoon figures created by Bud Fischer, which were popular before World War II. The slang expression has been heard in London from the late 1940s to the present day. It was spread further afield by its use by the character of Albert in the popular 1960s television comedy series Steptoe and Son.
- noun meat from a fully-grown sheep