曾经狠狠爱过他
[céng jīng hĕn hĕn ài guò tā]
This internet username means 'Once loved him fiercely'. It refers to having loved someone very deeply in the past, but this love relationship probably doesn't continue today. This expression conveys a tone of nostalgia and regret in love, common emotions that are widely discussed in various cultural settings including literature and drama works in China.