From Wikipedia on Frivolous litigation there is a great quote from Lawyer Danial B. Evans:
[W]hen a judge calls an argument “ridiculous” or “frivolous,” it is absolutely the worst thing the judge could say. It means that the person arguing the position has absolutely no idea of what he is doing, and has completely wasted everyone’s time. It doesn’t mean that the case wasn’t well argued, or that judge simply decided for the other side, it means that there was no other side. The argument was absolutely, positively, incompetent. The judge is not telling you that you were “wrong.” The judge is telling you that you are out of your mind.
Very well put, IMO.