To highjack Hugos point, I've always been fascinated by a couple of childhood terms. One would be the game of 'tag', 'last touch' or 'it' - we always called it 'he' for some reason (in east London, where I was brung up).
The second is related to the game above; if you wanted immunity for a brief period - to tie a shoelace for example - you would call out 'feignites' (not sure of exact spelling), then rejoin the game without penalty.
So, what was the game called where you lived and what was the 'feignites' alternative?