Dreaming that there is mud in your child's mouth means that you have been looking for a good job recently, your performance has been recognized, and you will get a satisfactory job.
I dream that I have mud in my mouth, and my work performance is satisfactory, and I can get what I want at work. The director is very sure of your dedication to your work and has gained a good reputation in your work. Solemnly declare: this answer is for reference only, please don't be blindly superstitious.