走路太拽小心闪腰
[zŏu lù tài zhuài xiăo xīn shăn yāo]
It humorously translates to 'Walking too cockily can easily hurt your waist/back'. This warns against being arrogant and advises humility. Being excessively self-assured, just like strutting too cockily, might result in harm eventually. In short, don’t be too full of oneself, or things could go awry.