What does your grandmother mean?

The derogatory term and greeting of "your grandmother" began in Shandong dialect, and "your grandmother" is often used to greet someone alone when they are strongly dissatisfied with someone or something. In the case of extreme dissatisfaction, the verb "damn, fuck, rub" can be used to express it better. The origin of this word is far-reaching. Now most netizens use "your sister" to make it easier and better pronounced. (This greeting is generally not recommended)