self-description       
noun [ C or U ] uk/ˌself.dɪˈskrɪp.ʃən/ us/ˌself.dɪˈskrɪp.ʃən/
 自称;自我形容
the act of saying yourself what you are or what you are like, or a description in which you do this
  The more his students achieve, the less he seems to resemble his self-description as "just a regular classroom teacher". 他的学生取得的成绩越多,他似乎就越不像他“不过是个普通教书匠”的自我描述。 
 They noted that the political self-description of "economically conservative and socially liberal" was becoming increasingly common.
 - More examples
 - They found that successful women tended to avoid self-descriptions that involved stereotypically feminine traits.
 - Befitting her self-description as "the people's diva", she doesn't spend much time worrying about unimportant stuff.
 - He called himself "a citizen of the world", and that self-description could not be more accurate.