汉 means 'a man'
嫁汉 means 'marry a man'
穿衣吃饭 are the primary needs for people
In the past time of China, most women couldn't get an eduction and a job to support themselves, the only way for them to survive was marrying a man. So 嫁汉嫁汉,穿衣吃饭 means 'marry a (good) man, live a good life'.