Learn Chinese--喋喋不休 [dié dié bù xiū]

喋喋不休 [dié dié bù xiū]: chatter without stop; chatter [rattle] away; Something that repeats causing annoyance.

dié dié ： xíng róng shuō huà duō ；
喋喋：形容说话多；
xiū ： tíng zhǐ 。
休：停止。

láo láo dāo dāo ， shuō gè méi wán 。
唠唠叨叨，说个没完。

E.g.

zhǐ yào jiǎng dào tā zì jǐ ，   tā jiù dié dié bù xiū de jiǎng gè méi wán 。
只要讲到她自己， 她就喋喋不休地讲个没完。
Once she started to talk about herself, she would rattle away for a long time.

Synonym:

唠唠叨叨 [láo láo dāo dāo]: constantly repeat ...; din into sb. [sb.'s] ears;

E.g.
        
láo láo dāo dāo shuō gè méi wán 。
唠唠叨叨说个没完
chatter interminably;