plural of scum valve

A blowdown valve mounted at the water level of a boiler, used to blow down lighter oily or foamy deposits that float on the water.

Algae, especially when growing on the surface of a pond. / Worthless, insignificant person or people.

The buildup of insoluble calcium or magnesium fatty acids from the use of soap with hard water, which leads to a dulling of surfaces and acts as a matrix for trapping soils.

comparative form of scummy: more scummy

superlative form of scummy: most scummy

(slang, derogatory) A sleazy, disreputable or despicable person; a lowlife.

plural of scumbling

dung

to void excrement