This word only became popular at the end of 20 17, and it came from the corrupt cultural circle. Because cpy's original statement is too explicit, vulgar and sensitive, it is an alternative connotation expression and a common expression in today's network language.
Now there are many official accounts of crispy duck WeChat on WeChat. For example, "Take a bite of crispy duck", an official WeChat account, is doing very well, updating original articles every day, recommending bad dramas, etc., and many crispy duck girls are paying attention.