一整天的想一整夜的念
[yī zhĕng tiān de xiăng yī zhĕng yè de niàn]
This can be translated as 'Thinking all day and Missing whole night'. This internet handle suggests a deep longing for someone - thoughts consuming every moment. The person could be in love or has a lot on his mind regarding a special individual, feeling unable to let them out of mind for long.