slag

IPA: sɫˈæg

Waste material from a mine.
Scum that forms on the surface of molten metal.
Impurities formed and separated out when a metal is smelted from ore; vitrified cinders.
Hard aggregate remaining as a residue from blast furnaces, sometimes used as a surfacing material.
Scoria associated with a volcano.
(UK, Ireland, slang, derogatory) A prostitute or promiscuous woman; a slut.
(UK, Ireland, derogatory, dated) A coward.
(UK, Ireland, chiefly Cockney, derogatory) A contemptible person, a scumbag.

(transitive) To produce slag.
(intransitive) To become slag; to agglomerate when heated below the fusion point.
(transitive) To reduce to slag.
(transitive, slang) To talk badly about; to malign or denigrate (someone).
(transitive, Ireland, slang) To make fun of; to take the piss (tease, ridicule or mock).
(intransitive, Australia, slang) To spit.

Examples of "slag" in Sentences

The metal industry creates a lot of slag as a byproduct of the smelting process
The factory had to dispose of tons of slag waste in an environmentally friendly manner
The old abandoned mine was filled with piles of slag left over from years of excavation
The blacksmith used the slag from the forge as a building material for his workshop
The archaeologists uncovered ancient slag remnants from an old iron production site