What idioms are used to describe stuttering?

Hesitant (tūn tūn tǔ tǔ): describes wanting to say but not saying it happily.

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Q Ο Qī Qī ià i: describes a person who stutters repeatedly and is not fluent.

Stuttering (kē kē bā bā): It describes that speaking is not fluent, which is equivalent to stuttering.

Jiē jiē bā bā: refers to the incoherent or intermittent repetitive sound when speaking because of excitement or stuttering.