What is Cajun?

[solozaur]

Since i first saw the episode with the wedges I looked for the cajun condiment allover, asked friends and nobody even heard of it and I can't find it in stores either.
I even asked my brother too look for the cajun condiment when he went in the UK and he couldn't find it there either!

From my google searches i found out that you can make your own cajun, so can someone please link to a good guide on how to do that?