猪八戒说，“你这个弼马温!" baidu.com: “弼马温”不过是辟马瘟的谐音而已。
Someone else told me, 弼马温 might really be 弼马翁。
弼马温 was 孙悟空's job in heaven. baidu.com here has: "这样能有效的趋避马瘟。"
Was Sun Wu Kong's job really to agitate the horses to avoid them getting horse fever? Did the ancient Chinese really keep monkeys in their stables?