What is goody two shoes?

"Goody Two-Shoes" is a term used to describe someone who is naively virtuous or self-righteous. The phrase originated from an 18th-century children's tale called "The History of Little Goody Two-Shoes," which tells the story of a poor orphan girl who receives shoes from a wealthy benefactor and uses her newfound literacy and creativity to better herself and help others. The character of Goody Two-Shoes has since become a cultural icon and an archetype in literature and pop culture, representing both positivity and excessive moralism.