Is a phrase coined by indie band Hadouken!, from the song "That Boy That Girl".
"That girl's an indie cindy,
Lego haircut and polka-dot dress,
I don't care if she thinks she's indie,
How she's different is anyones guess".
The term is actually a piss take of indie wannabes, and the stereotype of indie kids. Dumb, naive indie wannabes then change their myspace name to "indie cindy" trying to be cool, or show the vast knowledge of indie music lyrics. All the time actually looking like a complete moron.
Fake indie girl: Hadouken are well bum, I'm such an indie cindy.
Real Indie Girl: Your a complete fuckwit, please die in a tent fire.
Fake Indie Girl: Oh my days, I well need a lego hair cut! That would be so safe!