The phrase comes from the behavior of sled dogs after they eat the raw flesh of Greenland sharks, which often contains a strong neurotoxin.

• 这种说法来自于雪橇狗吃了新鲜的生格陵兰鲨鱼肉之后的‘举止’，因为这种鲨鱼肉通常都含有较强的神经毒素。