I'm often surprised when people tell me they didn't realise that Cuttleshock is just a Spoonerism of the feathered piece of sporting equipment... it's not much more than that. Badminton isn't particularly important to me; it's definitely one of my favourite sports, but that's relatively speaking. I've never watched a badminton game in my life, that I can remember, and only play it at most every couple of months with my sister.
Of course, aside from 'shuttle****', the obvious components of this name are 'cuttle[fish]' and '[electric] shock'. I was aware of that but it was never of much significance. It wasn't until much later that I realised just how awesome cuttlefish are and decided to claim them as one of my favourite animals.
I spent a good few weeks, at least, working my way through different funny and memorable potential usernames before settling on this as my universal internet handle four years ago; rejected ideas, equally meaningless other than sounding fairly nice, include 'Elephone' and 'SpargelSparkle' (from German for 'asparagus'). I've unfortunately lost the original document... it was full of some lovely ideas.