What is the baked sweet potato that fans often say?

Roasted sweet potato means: shit. There is a joke for reference:

A farmer's uncle went to town for the first time and was anxious to find a toilet. He asked someone to say that there was one in a nearby cinema and was stopped at the door. "Buy a ticket, 20 yuan," the old man thought. You have to buy a ticket to go to the toilet in the city. He also bought a 20 "ticket because he was in a hurry. He said: "This city is very good. The toilet is so big and there are so many people together. He sat down and asked the people behind him, "When will it start?"

"Start when the lights go out."

After a while, the light went out, and the old farmer took off his pants and began to relax. As he did it, he thought, it's nice to be in the city, and there is such a big TV when you shit. Suddenly, he felt someone pushing him behind him, so he said impatiently, "Don't move! Mind your own business! " The people behind are still pushing the old farmer, and the old farmer is even more impatient: "I told you not to move and mind your own business!" " "

The person behind was anxious and said, "Grandpa, I want to tell you that your baked sweet potato fell on my foot!" " "

Sincerely answer, please accept it if you are satisfied, and wish you good luck!