本片讲述的有着一张又气又乐的“贫嘴”张大民（冯巩饰），和两个弟弟两个妹妹，一个老母亲过着井井有条的“幸福生活”。 生活也不易但天上掉馅饼的事也有，邻居云芳的男友因出国和她分开，情绪低落以至于滴水未进，而大民巧舌如簧，逗的云芳开心从而和大民在一起了，两人安心的完成结婚典礼，经过一番折腾，因为房间有限，弟弟妹妹和老母亲就挤在外屋，大民就有了自己的“卧室”。生活没过多久，弟弟三民就带着女友回家宣布自己的幸福也来了，于是大民用木板隔离卧室，就成了2个房间，这2对夫妻安顿了后，可是三民夫妇夜里折腾的动静让大民夫妇无法忍受，大民醉酒后便和三民展开了一次谈话，。今时不同往日，大民终于迎来了他的新家，带上妻儿母亲一起住上了新房，来到新家大民依旧是那个又气又乐的大民，他告诉儿子：“要好好幸福的活着，没事就得偷着乐

This film is about Zhang Damin (played by Feng Gong), an angry and happy "poor mouth", two younger brothers and two younger sisters, one The old mother lived an orderly "happy life". Life is not easy, but there are also things that fall from the sky. Neighbor Yunfang’s boyfriend separated from her because he went abroad, and he was so depressed that he didn’t drink any water. Damin was so eloquent, and Yunfang was so funny that he stayed with Damin The two completed the wedding ceremony with peace of mind. After a lot of tossing, because the room was limited, the younger siblings and the old mother were crowded in the outhouse, and Damin had his own "bedroom". Not long after living, the younger brother Sanmin took his girlfriend home and announced that his happiness was coming, so Damin separated the bedroom with wooden boards, and it became two rooms. Damin and his wife couldn't bear it, and Damin had a conversation with Sanmin after he was drunk. Today is different from the past, Damin finally ushered in his new home, brought his wife, children and mother to live in the new house, and when he came to the new home, Damin was still the same angry and happy Damin, he told his son: "Be happy If you are alive, you have to have fun when you have nothing to do"