Domain parking is another internet-based way to possibly, maybe, get a few dollars here and there. The typical domainer (a person who makes their living off of the buying and selling of domains) has a portfolio of thousands upon thousands of domain names. The ones who are lucky or quick get the nice 5-letters and under domains. The ones who are unethical typosquat and infringe on legitimate companies' trademarks.
You really shouldn't infringe on anyone's trademarks.
We might be doing a series on the benefits and drawbacks of the different parking services, but for now, NameDrive (banner below) will suffice. They're based out of the UK and set up for domain parking through them is a breeze.