Rex Jameson (né Coster; c.11 June 1924 – 5 March 1983) was a British comedian and female impersonator known for his creation and stage persona Mrs Shufflewick.

[2] To avoid confusion with the entertainer Sam Costa,[3] he changed his name to Rex Jameson – his biographer Jonathan Cecil suggests that he chose the name of a well known brand of whiskey, but in fact, the name 'Jameson' was that of his 'adoptive' mother, Nell Jameson, who cared for him for many years in Southend – and joined the resident revue team at the Windmill Theatre, London, where he performed for eight years and was a personal favourite of owner Vivian Van Damm.

His act was as an archetypal woman in the corner of a pub, outwardly prim but liable to slip into tales of past sexual adventures;[5] "a gin-soaked old tart", according to the writer Richard Anthony Baker.

[1] In a 2013 study of British comedy, John Fisher suggests that Jameson's Mrs Shufflewick kept alive the tragi-comic spirit of the music hall star Nellie Wallace.

He appeared briefly in the 1970 Marty Feldman film Every Home Should Have One, and toured working men's clubs in the north of England, where his bawdy material proved popular, but he also faced hostility for his increasingly overt homosexuality, and his alcoholism meant that he lost some of his previously impeccable timing.