one who draws attention to the minor errors made by others, esp. in a pestering manner; a pedantic gadfly. It fits a real need — and the etymology is delightful as well. From the OED: 1952 H. NICOLSON in Spectator 22 Aug. 238/1 Often have I tried to supplement my vocabulary by inventing words, such as 'couth', or 'doriphore', or 'hypoulic', feeling that it is the duty as well as the pastime of a professional writer to make two words bloom where only one bloomed before. in Ibid. 17 Oct. 500/1 The doriphore..is the type of questing prig, who derives intense satisfaction from pointing out the errors of others. 1960 Age of Reason xii. 223 Boileau was so hurt by this reproof on the part of a female doryphore that he never set foot in Reuilly again. 1960 Daily Tel. 9 Dec. 19/3 The idiomatic implications of such a word as doryphore in his [sc. Sir Harold Nicolson's] own text is left for the ignorant to guess. (It means a Colorado beetle and, hence, a pest.) 1970 Times Lit. Suppl. 4 June 615/3 The editor..must..shrug off the pricks of professional doryphores. 1989 New Yorker 3 Apr. 99/2 When [the editors]..took me to lunch, they were rigidly abstemious, lest they fuddle their minds and give hostages to subsequent doryphores on returning to work.