Definition from Wiktionary, the free dictionary
- (cricket) The batsman who bats ninth.
- (soccer) The centre forward
- (dated, British Army military slang) A laxative pill.
1930, Siegfried Sassoon, The Complete Memoirs of George Sherston: Memoirs of an Infantry Officer, London: Faber and Faber, page 310 (Faber Paper 1972 edition):
- A number nine pill was all they could hope for if they went sick.