I'm rather at a loss for words myself tonight, so rather than just pilfer the link from Clear Blue Skies, I'm going to half-inch Dave Clear Blue Sky's text as well:
"It's a website that traces the origins of English words and phrases and documents their meanings and mis-use. It also has regular reviews of books about language, longer articles and sections for topical and weird words, all of it written by Michael Quinion.
So, if you have ever wondered why we say things like "It's raining cats and dogs" or where the word flummox comes from then why not pay a visit and find out.