Wow, this is interesting. It looks like rofl was denied ...twice. And then finally approved on the third try. Appearently, rofl in TMed and covers jsut about everything under the sun, except for a humor site....rofl...
So here is the delema, you could use it as a humor site, and you could make moeny from the domain as long as you don't tread in te areas claimed in the TM. So if you use Adsense on the site, be very very careful. One thing you cannot do is sell merchandise with ROFL on it unless you are able to get ROFL as a registered mark, maybe more as a logo since it would be a different catagory.
In all honesty, if this is your domain, I would get a good IP lawyer to help you out.