a goody two shoes
A goody two shoes is a girl who thinks she’s better than everyone else because she never does anything bad, like smoking, drinking, or even holding hands with a boy.
My goody two shoes friend would faint if she heard me swear at lunch.
My goody two shoes cousin never even eats junk food and goes to church every Sunday.
My goody two shoes classmate thinks everyone else is a sinner and lectures me about my ‘sinful’ lifestyle.