The general advice is yes, you need regular meals to keep you metabolism working most efficiently. I don't suppose it matters if you only eat lunch on an occasional basis but I think people would say that to do that regularly isn't such a good idea.
Skipping meals definitely is not a good thing, as Ailidh stated, you need to eat regularly to keep from lowering your metabolism. Maybe try to drink a slim fast or something to that affect? that way you are getting your calories and nutrition yet don't necessiarly have to eat?
"Life is a journey, you hold the map." ~Author Unknown