goody two shoes

The phrase "goody two shoes" refers to someone who is excessively well-behaved, moral, and virtuous. It often carries a slightly negative connotation, indicating that the person may be perceived as self-righteous or overly obedient. The term originates from the title character in the 1765 children's story "The History of Little Goody Two Shoes," in which the protagonist is excessively good and rewarded for her virtue.