What is Nasty Girl?
1.
Nasty Girl, is a Girl who no Longer cares about her Reputation and that likes to get bone down and suck up guys and shit like that, deffinately someone you dont want to be friends with..
"so that chick i hooked up with lasst niight, Man! , she was a Nasty Girl"
See
2.
a
"look how she is dressed! nasty girl!"
See