Pig's Head Three comes from the ancient Shanghai rituals. The three necessary offerings: a pig's head, a chicken and a fish, collectively known as the "Three Sacrifices". The pig's head is the first, so it is also called "pig's head three animals". In Shanghainese, "牲" and "生" have the same sound, pronounced as sang (the third tone), and "猪头三" is actually "猪头三" (pig's head, three animals). ---Pig's Head Three" is actually the Tibetan ending of "Pig's Head Three--Livestock", and "livestock" is "raw". In the beginning, it referred to those outsiders who had just come to live in the city and were clumsy because they were unfamiliar with the city. Later on, the meaning of pig's head three broader, generalized to refer to those things stupid, not smart, a little stupid. In the old days, when a girl was whining, she would say, "You're pig-headed!" Guaranteed that the boy's bones immediately crisped off.