The aim is to try to outdo the last word. Preferably by finding a similar word that is longer in some way. It goes without saying that words needn't be plausible. If you're really stuck as to how to beat a word, you can just think of a new one. Right, I'd better not start with too big a word, so that it can be beaten.

Pi

Oh, cute XD I used to play kinda like this game, but I'd type long words into google, and see if I got a hit... like googlewhack but a bit different XD

Psi

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Days until I start at Warwick: Too many! ^_

Oh gosh, that's a good choice.

ePSIlon

EPSILONs

Just in case anyone hasn't realised this, there are currently at least three fake versions of my account on the forums, and if neccesary you can tell them apart by the join dates and post counts. You'll notice that the above two posts were both made by different fake accounts. They are just making fun of me. Never mind, they haven't done anything hurtful yet and I'm supposed to be somewhere in five minutes. Well, have fun larking about guys.

Well, it's not hard to work out who some of them (originally) were.

erm...varepsilons ?

varey big cylons.

vaery big anticyclones

new one: euler

in a similar manner to "antidisestablishmentarianism", I wonder what can be done with prefixes, hyphens, etc. Take "non-well-definedness", for example.