Source: Futility Closet

On June 11, 1900, someone in Harvard Yard called out “Oh, R-i-i-i-n-e-HART!” There must have been something in the air, because hundreds of students repeated the cry, and for the next 40 years it took on a strange life of its own. Journalist (and alumnus) George Frazier mentioned it in his 1932 song “Harvard Blues,” recorded in 1941 by Count Basie.
John Barrymore mentioned it in his 1939 film The Great Man Votes. Thomas Pynchon describes it in his novel Against the Day. Today it’s documented in slang dictionaries and has entered the realm of legend: A Harvard man menaced by Arabs in Africa supposedly cried “Rinehart!” and was rescued by a fellow alumnus from the nearby French Foreign Legion.The truth is more prosaic. Rinehart is John Bryce Gordon Rinehart, class of 1900. A contemporary article in the Harvard Crimson explained:
Rinehart, who is an earnest student, has been in great demand as a tutor to other men in his courses. As he lives at the top of Grays hall his friends have sought to find out whether he was in or not by directing plaintive cries of ‘Rinehart, O Rinehart’ at his…