folklore

Noun

1. The tales, legends, superstitions, and traditions of a particular ethnic population.
   • [T]here is no true American music but the wild sweet melodies of the Negro slave; the American fairy tales and folk-lore are Indian and African; and, all in all, we black men seem the sole oasis of simple faith and...
   • Why has not England a great mythology? Our folklore has never advanced beyond daintiness, and the greater melodies about our country-side have all issued through the pipes of Greece. - 1908–1910 (date written; published...
   • “Lisieux is a little town in Normandy,” she said. “I was there a few days with your father, one summer, long ago. It’s a country full of old stories, folklore, and traditions; and the people still believe in the Old...
2. The tales, superstitions etc. of any particular group or community.
   • A selection of longer items of hacker folklore and humor is included in Appendix A, Hacker Folklore. - 1996, Eric S. Raymond, The New Hacker's Dictionary, 3rd edition, MIT Press, →ISBN, page 3:
   • Foxes boss Rodgers had a smile that illuminated Wembley as he joined Leicester's players in joyous scenes of celebration after the manager and his players had written their name into the club's folklore. - 2021 May 5,...
3. The collective of proofs or techniques which are widely known among mathematicians, but have never been formally published.