This could qualify as a game topic.
The only rule is thus - express your indieness to the above poster in a way that dwarfs theirs. It doesn't matter if it's made-up or true, the point is to be as elitist, silly, witty or whatever as possible.
e.g "I'm so Indie that I shit Radiohead demos"
to which another person replies
"Yeah? Tough dice, motherfucker, I'm so indie that I piss the tears of Matt Bellamy"
ect.ect.ect
I'll begin.
I'm so Indie that a South African Black Metal band added me on MySpace without a single prompt.