we were warming up at rehearsal and Pete my drummer was playing this groove he had just learnt and asked him if he`d been listening to Neil Peart and he said it was the "Purdie Shuffle" so i looked it up and found this-most of you drummers will have seen this but it`s worth it to see someone enjoying their craft:
 http://www.wimp.com/purdieshuffle/
cheers

Well, that should answer the question, "what is rhythm ?".