2 sentences for 吃吃 (chī​chī)

1. 她听了这话，忍不住吃吃地笑了起来。

   tā tīng le zhè huà, rěn bù zhù chī​chī de xiào le qi​lai.

   Hearing this, she couldn't help but giggle.

   Source: Dong Chinese Dictionary

2. 他说话有些口吃，总是吃吃地半天说不出话来。

   tā shuō​huà yǒu​xiē kǒu​chī, zǒng​shì chī​chī de bàn​tiān shuō bù chū huà lái.

   He has a bit of a stutter and often struggles to speak for a while.

   Source: Dong Chinese Dictionary