Qat

One of the words people will hate you for in Scrabble, as it doesn't have a U after the Q. Its listing in the Illogico-Webster Dictionary (the print version of IllogiDictionary) reads as follows:

Qat adnoun, verbjective

1. A small Mexican hat
2. A small Mexican greeble
3. Some word I just made up
4. Term denoting surprise

Eg. Qat the hell?

There are other meanings but, hey, it takes forever to write a dictionary, you know. I couldn't be bothered adding them all. My pen ran out of ink.