I remember when I was younger and read a children's magazine, and there was a page with slang words.
I think I pretty much used some of the words just to sound cool and stuff. (I had a phase once, where I tried to be cool and "hip hop" and all that)
And there was the words "dude" and "dudette".
Dudette is the more feminine version of it.
But I think that this magazine was probably the only time that I saw "dudette" being used.