Weihnachtsgurke
http://german.about.com/library/blgermyth11.htm
Pigs are lucky all year long because you may eat them and sell them. Prosperity. Of course, you can still use it, famously, as an insult and combine it with dog. lol There is a hard candy pig you can smash for New Year's luck but I think I'll stick with Hoppin' John and a jelly donut.