Looking for a hilarious joke

An old country man bought two new barrels full of things by bus. Many people in the car didn't have seats, so he sat on a bucket. At the next stop, someone got on the bus. A middle-aged woman didn't have a seat, so she saw some countryman's bucket and sat on it. The countryman wanted to get off at the station, but which woman was still sitting on it. He wanted her to get up, but he was afraid that she wouldn't understand her hometown dialect. So I said to her in Mandarin: "Miss, lift your fart and let me fight".