It's called a forebearence, and as long as your credit is good and you are in good standing most lenders will work with you if you have a legitimate need for doing so. Buying Christmas presents isn't going to cut it. There is a fairly lengthy form you need to fill out, and they can take 10-30 days to make a decision. It can sometimes affect your credit negatively, be certain you find out how they plan on reporting it.
Also, depending on your interest rate, how long you've owned your home, and the type of loan you have, it might be a very small amount of money you are saving--as low as a couple hundred dollars or so, find out what your monthly interest/principal payments are before going further to be sure it's a logical thing to do for your circumstances.
Anne