A suffix meaning 'covered with' or 'smeared with' (e.g., 血まみれ 'covered in blood', 泥まみれ 'covered in mud').
事故の現場は血まみれで、見ていられなかった。
The accident scene was covered in blood; I couldn't bear to look.
子どもが泥まみれになって遊んでいる。
The children are playing, covered in mud.
うそまみれの話にはもう騙されない。
I won't be fooled by a story full of lies anymore.
汗まみれで一日中働いた。
I worked all day, soaked in sweat.