2 sentences for 多嘴 (duō​zuǐ)

1. 这是人家的私事，你别在那儿多嘴。

   zhè shì rén​jia de sī​shì, nǐ bié zài nà​r duō​zuǐ.

   This is someone else's private business; don't poke your nose in.

   Source: Dong Chinese Dictionary

2. 他这个人一向很多嘴，什么秘密都守不住。

   tā zhè gè rén yī​xiàng hěn duō​zuǐ, shén​me mì​mì dōu shǒu bù zhù.

   He has always been a big mouth; he can't keep any secrets.

   Source: Dong Chinese Dictionary