goody-goody

/G UH1 D IY0 G UH0 D IY0/
noun
  1. 1

    A well-behaved person with no obvious human failings, with the possible exception of smugness and self-satisfaction.

adjective
  1. 1

    Mawkishly good; weakly benevolent or pious.

    syn:goody

Synonyms

Source: https://en.wiktionary.org/wiki/goody-goody