To me, wowser is a longer form of the word wow, that is, it's something to say to indicate surprise and joyful satisfaction.
I've just discovered, however, that in New Zealand a wowser is a person of very strict puritanical tendencies, and quite possibly a teetotaller.
Still, I suppose the chances of confusion are relatively slight. I mean, few people express much joyful satisfaction when they see one of those.
illustration by Edgar Wilson "Bill" Nye
Word To Use Today: wowser. This word was invented in the 1900s and comes from the English dialect word wow meaning to whine or complain.