goody (n.) Look up goody at Dictionary.com
also goodie, "something tasty," 1745, from good (adj.) + -y (2); adj. use for "sentimentally proper" is 1830 (especially in reduplicated form goody-goody, 1871). As an exclamation of pleasure, by 1796. Goody also used since 1550s as a shortened form of goodwife, a term of civility applied to a married woman in humble life; hence Goody Two-shoes, name of heroine in 1760s children's story who exulted upon acquiring a second shoe.