NOUN (1)

1. a person who behaves extremely well in order to please a superior;


ADJECTIVE (1)

1. affectedly or smugly good or self-righteous;

The Collaborative International Dictionary of English v.0.48:

Goody \Good"y\, a.
   Weakly or sentimentally good; affectedly good; -- often in
   the reduplicated form goody-goody. [Colloq.]
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Goody-goody \Good"y-good`y\, a.
   Mawkishly or weakly good; exhibiting goodness with silliness.
   [Colloq.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

goody-goody \good"y-good"y\, n.
   A person who is weakly, sentimentally, or affectedly good; a
   goody-goody person; -- sometimes used to refer to person who
   acts with good intentions but who bunglingly does more harm
   than good. The latter may sometimes be deprecatingly referred
   to as a goo-goo. [Colloq.]
   [PJC]

WordNet (r) 3.0 (2006):

goody-goody
    adj 1: affectedly or smugly good or self-righteous
    n 1: a person who behaves extremely well in order to please a
         superior