Folklore, or lore, or a folk tale or folk wisdom were the collected legends and beliefs of a culture. Proverbs were often sourced in folklore. (TNG: "The Naked Now")
The Megans found a way to escape Salem after immersing themselves in Megan lore. (TAS: "The Magicks of Megas-Tu")
As part of the Beowulf holodeck program, Freya might ask participants if they were a master of herb lore. (VOY: "Heroes and Demons")
A notable collection of Talaxian folklore was Eldaxon's Collected Folklore. (VOY: "Dragon's Teeth")
In 2366, Perrin classified Bendii Syndrome as "more a folk tale than a disease", stating that no true case of it had existed in Sarek's lifetime up until that point. (TNG: "Sarek")
Bolian folk wisdom had it that giving birth near a warp core would improve the baby's disposition. Chell passed this on to father-to-be Tom Paris in 2377. (VOY: "Lineage")