Costume Clothes

How I can build a cheap Halloween costume Using clothes you already own?
I have a Halloween party up at the university I attend. I can not pay to go to buy or rent the costumes available in stores, although many suits and clothing to help build a suit. I just need help finding an idea, because I do not want to be the typical hippie rock chick, goth, vampire or nerd. I want to be unique in more than 150 people will be at the party, and I do not want to use the same as someone else. Can anyone help?
Zombie is an idea. You can rip some old clothes so they are really torn, then with red spots. The sauce is good, because humans are really juicy and has that look chunky. Then you must be a "death pale" can be achieved with white pancake makeup or cheap. Here are some fake scars, maybe a bit of soot. A bit of toilet paper mixed with make-up and rubbed his face are made for a flaky, lumpy. Liquid latex is good to stick things in the face, but that is something of a specialty item. Try looking at YouTube. There are plenty Theatre / makeup DIYs published.
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