sludge
nounUK /slʌdʒ/
US /slʌdʒ/
Thick, soft, wet dirt or mud.
My boots got covered in sludge after walking through the wet field.
OTHER MEANINGS
2. Thick, dirty waste material produced by factories or sewage systems.
The factory was fined for dumping sludge into the river.
3. A thick, heavy buildup of oil or dirt inside an engine.
The mechanic flushed the sludge out of the old engine.
4. A soft, wet mixture of snow and dirt on the ground.
By afternoon the fresh snow had turned to brown sludge on the roads.
5. A heavy, sluggish feeling or condition.
He felt like his mind was moving through sludge after the long flight.