sludge

Short definition from Wiktionary

Noun

1. 1
   Solids separated from suspension in a liquid.
2. 2
   A residual semi-solid material left from industrial, water treatment, or wastewater treatment processes.
3. 3
   A sediment of accumulated minerals in a steam boiler.
4. 4
   A mass of small pieces of ice on the surface of a water body.
5. 5
   Ellipsis of sludge metal.
6. 6
   Institutional policies that introduce tedium and inefficiency in processes.
7. 7
   An acronym used to help remember the common symptoms of certain affections of a cholinergic toxidrome: salivation, lacrimation, urination, defecation, gastrointestinal upset, emesis.

Verb

1. 1
   To slump or slouch.
2. 2
   To slop or drip slowly.