很酷满嘴污
[hĕn kù măn zuĭ wū]
Despite seeming contradictory at first glance, this nickname may imply a very laid-back or unconventional individual. On one hand, 'cool' refers to someone's charming appearance and personality. On the other hand, 'filthy mouth' indicates they speak bluntly, without worrying about being politically correct, possibly in pursuit of authenticity and freedom of expression.