自報家門 [－报－门]

Jyutping zi6 bou3 gaa1 mun4
Pinyin zì bào jiā mén

Definitions (CC-CEDICT)
  1. to introduce oneself
  2. originally a theatrical device in which a character explains his own role
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    to give a self-introduction; to introduce oneself
  2. phrase, idiomatic, of an actor
    to introduce their character