sludge out
Advanced (C1) neutral
To clear out thick, muddy gunk from a pipe, tank, or engine
"They had to sludge out the old oil tank before installing the new heating system."
Hear it in context
Sardine Challenge 2.0 (3 Day Metabolism Restart)
Dr. Boz [Annette Bosworth, MD] · 2:16
You want the sludge out of there.
"A Grim Enemy For Reasons We Do Not Yet Comprehend"
The Rest Is Science · 9:26
and then like casting all of the sludge out.
America Made Its Most Toxic Lake. Now We Need What's Inside.
PBS Terra · 7:46
Hey, we got a lot of sludge out of that pit.
This Engine Hasn't Run For 50 Years.
Garbage Time · 11:54
Well, we were worried about getting that last of the sludge out.