Correct

嘴啃泥

/ zuǐkěnní / 
Strokes

Definition

to fall flat on one's face

Example

As an Adverb

(falling) on one's face

1
Shuāi
摔
le
了
gè
个
zuǐ
嘴
kěn
啃
ní
泥

fall on one's face; kiss the ground