装逼卖萌小贱人
[zhuāng bī mài méng xiăo jiàn rén]
In casual terms, it refers to oneself as somewhat mischievous, showing off while being endearing. Despite the seemingly harsh words 'bad/mean/small', it generally doesn't bear negative meanings here but suggests playfulness mixed with a slight attitude. Note: In some cultures, similar phrasing can be seen as vulgar, it is not always offensive and depends heavily on context and relationship between parties involved in communication.