I'm going as Nyan Cat! It's going to be awesome. I just have to get a few more things before I can start to put it all together.
A buddy of mine is considering going as Tac Nayn.
Natkat: I don't know if you're wanting to be a specific character from something or not, nut if not, then I have a few ideas. You could do an easy cop-out like my brother did once; he put on some tan cargo pants, some work boots, a random Tshirt, and then just wore a backpack and told people he was a camper/hiker.
One year I went as the opposite of myself and borrowed a cheerleader outfit from one of my teachers. I did my hair, makeup, everything. So, maybe you could do a really over-the-top girl costume? Like borrow some really girly clothes, put on a ridiculous amount of lipstick/other makeups, get a really cheap wig and stuff your shirt so that it's all really ridiculous. Then you could say you're going as a girl.