待我一日出头定必天还猖
[dài wŏ yī rì chū tóu dìng bì tiān hái chāng]
It means 'wait until I become famous then I would live more wildly.' This shows someone who aims to get acknowledged, and once their goals are fulfilled, they can afford to be bolder in life. It indicates confidence and ambitious aspirations while also suggesting defiance and a wild lifestyle awaiting accomplishment.