grundyism: [19] The term grundyism ‘prudishness’ was based on Mrs Grundy, a character in Thomas Moreton’s play Speed the Plough 1798 who became proverbial for her extreme rigidity in matters of sexual morality. Dame Ashfield, another character in the play, when contemplating some ticklish moral dilemma would invariably ask herself ‘What would Mrs Grundy say?’. [grundyism etymology, grundyism origin, 英语词源]