Yes, it is indeed Santa's Butt.
My eight-year old son and I were over at Monster Beverage getting some holiday grog, and came across this. Let me tell you, in terms of taste it's a fairly decent porter, but the real value is the comedy goldmine my son latched onto! Show an eight-year-olds anything to do with butts and they're done! He laughed for half an hour and it really made my day! The beer could have tasted like dogwater (it didn't) but it still would have been worth it to hear him laugh.
Those of you with young suns, get a piece of Santa's Butt!