Meaning 意义Speak of the devil (and in he walks). This idiom means "talk about certain person and he appears".  A similar Spanish idiom is ""Hablando del Rey de Roma, por la ventana se asoma" (Speaking of the King of Rome, through the window he appears).  In Chinese, it is 说曹操,曹操到 ("shuō Cáo Cāo, Cáo Cāo dào"), which translates as "Speak of Cao Cao and Cao Cao arrives. Cáo Cāo is the a well known historical figure of ancient China during the Three Kingdom Period (220-265CE).Example 例子
  • Hey, I haven't seen Bob for a long time. Speak of the devil, here he comes.
  • Hola. hace tiempo no he visto a Bob. Mira, hablando rey del Roma, aquí viene Bob ahora.
  • 喂,我很久没有见过Bob. 说曹操,曹操到, 他正走过来!

 
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Meaning 意义

The most common meaning for this slang is something or a name which sounds familiar and causes someone to remember something or someone.  El modismo significa que hay algo o un nombre que provoca una memoria o conocimiento. 这一俚语最常用于某些事物或名听起来熟悉。

Example 例子

  • Hi, this is Brandon. Does it ring a bell to you? I am the person who always asks you to visit his blogs. 
  • Hola, soy Brandon. ¿Te acuerdas de mi? Yo soy la persona que siempre te pide que visites sus Blogs.  
  • 你好,我是布兰登,你记得我吗?我市一天到晚叫你上他的网站的那位。