A person that dislikes winter so much that they are constantly in a grumpy mood throughout the entire season. During the cold winter months they have a lack of patience and are very irritable, especially on a day with lots of snow. During the other seasons they are jolly people, but the cold brings out their inner crab for months at a time.
John: "I came home from Christmas shopping and started showing some of the stuff I bought to Dave. He snapped at me and was really mean for no reason"
Joe: "Dave always get like this during the winter when it's all cold and snowy. He is a real snow crab"