I've heard of painted on clothing, now there is spray on clothing.  Think of it like a can of silly string, instead of coming out in a stream, it's a spray that goes on your skin.  

The great thing about these spray on clothes is that you can spray them on and wear them, then take them off and wash and wear them over and over.  If you get tired of the design, there is a solvent that melts the clothes back down and you can make a new design out of it.

I think it's quite ingenious!