If you are full and have nothing to do, you are looking for trouble. To put it bluntly, a person is meddling or wasting time on meaningless things.
This dialect originally came from Jiangsu and Zhejiang dialects. It originated in the early years of the Republic of China. After the Revolution of 1911, for the sake of political stability, Mr. Sun Wen resolutely gave up party struggle and ceded the presidency to Yuan Shikai. I vowed to run this railway. So in the meantime, I traveled all over the country to investigate.
Once, he and his entourage wanted to cross the river. At that time, China had underdeveloped traffic and few bridges, especially in many areas of the southern river network. So they hired a ferryman to help them punt across the river.
Sun's conversation with the ferryman is meaningful. The ferryman felt very impatient. Mr. Sun kindly asked him, "When did you start punting?" Its original intention is to ask when to start this means of making a living. Who knows the ferryman replied, "I'm full." In other words, I began to support it after brunch.
They couldn't help snickering, and Mr. Sun was helpless. He even felt that China could not make up his mind without saving the country. Later, this statement was passed down from mouth to mouth and spread, becoming synonymous with asking for trouble.
Create right and wrong for no reason, create contradictions and entanglements, so heaven and earth make people hungry. Imagine carefully that this is not a good thing. When people are full, they will fight and do something harmful. Therefore, it makes sense for people to be hungry. It is good for them to try their best to survive and reduce friction with others.