You should NOT skip meals. There are so many adverse effects to skipping meals. Not only does it slow your metabolism but it can also lead to overeating, because when you do eat, you're overly hungry.
As for cutting your calories below your recommended allowance, remember this golden rule: Never allow your daily calorie allowance to fall below 1,200 if you are a woman and 1,500 if you are a man. Falling below these daily allowances can do real damage to your metabolism and result in excessive loss of lean muscle tissue. When you dramatically reduce your calories on a consistent basis, it can slow your metabolism or trigger a plateau. Consistent exercise — plus the occasional high-calorie day — will help ward off a plateau.
Get more fitness tips from Jillian Michaels.