You think you are somebody? 口语,语气重一些你以为自己是什么(了不起的)人?somebody 了不起的人,出人头地even a brick want to be somebody就是一块砖,也想出人头地(成为什么了不起的人物)另外,我觉得Who do u think u r?也很好
Who do you think you are?
WHO DO U THINK U R
you think you are who