noun which may take the genitive case particle 'no'
muddy; covered with mud; mud-caked
Describes something thoroughly covered or smeared with mud, often implying a messy state.
雨の日にサッカーをして、ユニフォームが泥まみれになった。
After playing soccer on a rainy day, my uniform got covered in mud.
子供たちは泥まみれに
The children were playing, getting themselves all muddy.