傻妞穿着拖鞋走天下北鼻身穿校服逛酒吧
[shă niū chuān zhe tuō xié zŏu tiān xià bĕi bí shēn chuān xiào fú guàng jiŭ ba]
It describes a carefree and confident attitude where one doesn't mind social conventions; it means 'Silly girl wears slippers to wander the world, while a kid in school uniform hangs out in bars', depicting someone non-conformist.