Definitions from Wiktionary ( )

▸ noun:  Waste material from a mine.
▸ noun:  Scum that forms on the surface of molten metal.
▸ noun:  Impurities formed and separated out when a metal is smelted from ore; vitrified cinders.
▸ noun:  Hard aggregate remaining as a residue from blast furnaces, sometimes used as a surfacing material.
▸ noun:  Scoria associated with a volcano.
▸ noun:  (UK, Ireland, Australia, slang, derogatory) A prostitute or promiscuous woman; a slut.
▸ noun:  (UK, Ireland, derogatory, dated) A coward.
▸ noun:  (UK, Ireland, chiefly Cockney, derogatory) A contemptible person, a scumbag.
▸ verb:  (transitive) To produce slag.
▸ verb:  (intransitive) To become slag; to agglomerate when heated below the fusion point.
▸ verb:  (transitive) To reduce to slag.
▸ verb:  (transitive, UK, slang) To talk badly about; to malign or denigrate (someone).
▸ verb:  (transitive, Ireland, slang) To make fun of; to take the piss (tease, ridicule or mock).
▸ verb:  (intransitive, Australia, slang) To spit.

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