" Usually when a guy says a girl is nice, he means she's boring, or a goody-goody. "

I can't figure out what it means ' goody-goody ' in this sentence. Has anyone used it before ? Seems to be the most up-to-date American slang. Emotion: big smile
the expression "goody two-shoes" (or "goody-goody) is a very old expression meaning someone who always does the right thing (much to the consternation of others).

among american teens, it often stands for a non-conformist, someone who will not smoke, drink alcohol, or have sex (before marriage). it is almost always used disparagingly.

(neither expression is new, but it may be making a comeback among teens.)