"Steam what?" I can hear you exclaim. Well I was similarly puzzled when I first came across the word earlier this week. In my trawls around ebay looking for purple tops and jackets (I've just put two of my purple very-much-loved garments up for sale as they are too big) I came across a rather lovely black crushed velvet jacket with purple frills and a bustle. Steampunk was part of the description which led me to look up the word.
Steampunk is a style based on a time where steam power is still widely used, typically Victorian Britain - but with elements of science fiction or fantasy. I think that steampunk probably sums up the way I would like to dress all the time if I dared. Floor-length skirts, tailored jackets with a peplum - that sort of thing - or tight leggings, high boots and a frock coat.
I can't quite believe I've missed this word steampunk for so long - it's been around since the late 1980s apparently. Well, you live and learn.