goody-goody
1. noun Someone who exclusively follows the rules and caters to authority figures; a teacher's pet. Jill's classmates called her a goody-goody after she volunteered to supervise the class while the teacher was away.
2. adjective Self-righteous or sanctimonious. Forget your goody-goody rules and go out on a school night for once!
a ˈgoody-goody
, a goody ˈtwo-shoes
(informal, disapproving) a person who behaves very well to please people in authority such as parents or teachers: Don’t be such a goody-goody!He’s a real goody two-shoes. He’d never do anything that might get him into trouble.