Meh

According to The Ottawa Citizen:
"Meh", a word which indicates a lack of interest or enthusiasm, became the latest addition to the Collins English Dictionary in England. Though the word apparently originates from North America, Collins said it was now widely used on the Internet, and was increasingly seen in British spoken English. The dictionary entry for "meh" will say it can be used as an interjection to indicate indifference or boredom, as an adjective to describe something as boring or mediocre, or to show an individual is apathetic or unimpressed.

I use this word all the time, I both say it and type it. Though I don't think that it should be in the dictionary, now people will use it in Boggle and it so shouldn't be allowed.