a goody two-shoes

goody two-shoes

1. adjective (used as a modifier before a noun) Of or having prudish, self-righteous, or rigidly moral standards. Many have been critical of the agency as being nothing but a goody two-shoes organization more concerned with telling people how to behave than serving their best interests.

2. An exceedingly or haughtily prudish, self-righteous, or rigidly moral person; someone who conforms inflexibly to the rules or the law. Mary is such a goody two-shoes, always squealing to the teacher when one of us does something against the rules. Our gang would have control of half the city if that goody two-shoes hadn't somehow gotten himself elected governor.

a goody two-shoes

INFORMAL

A goody two-shoes is someone who tries to please someone in authority or who never does anything wrong. No child wants to be a goody two-shoes, and this is one way for them to demonstrate that they're not. Note: This expression is used to show disapproval.