The traditional and common beliefs, practices and customs of a people, which are passed on as a shared way of life, often through oral traditions such as folktales, legends, anecdotes, proverbs, jokes and other forms of communication.
(Source: VFP)
the unwritten literature (stories and proverbs and riddles and songs) of a culture
the unwritten lore (stories and proverbs and riddles and songs) of a culture