Must. Remind. Self.. The OED is not an arbiter of, but a chronicler of, English language use.
Every year, the Powers-That-Be lean over the windowsills located high atop their Ivory Towers and cock an ear towards the milling crowds below. When they hear a word they do not recognize being shouted often enough, they dip their quills into wells of octopus ink and inscribe that word on gold-rimmed parchment.
Okay, not really. Actually, it’s only been since 2004 that Oxford has selected a word of the year at all. Judy Pearsall, editorial director at Oxford, explains that a language usage program “collects around 150m words of current English in use each month.” The word in 2013 that has become the most frequent was “selfie.” According to The Guardian,
The word can be traced back to a post on an Australian online forum in 2002: “Um, drunk at a mates 21st, I tripped ofer [sic] and landed lip first (with front teeth coming a very close second) on a set of steps. I had a hole about 1cm long right through my bottom lip. And sorry about the focus, it was a selfie.”
So now we can blame Australia for both Crocodile Dundee and the word “selfie”! (Just kidding, mates!)