A person (almost always a female) who tries to be as good and "clean" as humanly possible. She is more often than not a staunch conservative and takes pride in her virginity and her practice of abstinence
. She is definitely a God-fearing girl who always goes to church every Sunday, and indeed, based on the way she dresses, she looks like she's going to church every day. She cannot abide it when people cuss
in front of her–the most extreme goody two shoeses faint when hearing foul language–and of course she would never consider smoking, drinking, doing drugs, or having any physical contact with a boy beyond holding hands or perhaps a kiss on the cheek. Can be nice but eventually begins to lecture you about your "sinful" lifestyle and just becomes a pest.
"Oh no, she wouldn't even think of going to that house party. She's such a little goody two shoes."