青春是肆无忌惮旳挥霍
[qīng chūn shì sì wú jì dàn dì huī huò]
Means 'Youth Is Prodigality Without Scruple'. Reflecting on youthful exuberance and carefree living, where one might engage in unrestrained activities, enjoying life at the expense of careful consideration. It carries a note of regret yet fond reminiscence of young adventurous times.