Slag

Noun

 * 1) The impurities which result and are separated out when melting a metal or refining it from its ore; also, vitrified cinders.
 * 2) The scoria of a volcano.
 * 3)  A woman (sometimes a man) who has loose morals relating to sex. Meaning slut.
 * 4) A hard aggregate that is left as a residue from blast furnaces, which may be used as a surfacing material.

Synonyms

 * dross, recrement
 * see Thesaurus:promiscuous woman

Derived terms

 * slaggy

Verb

 * 1)  To make slag.
 * 2) used with "off", (slag off) To talk badly about someone; to denigrate someone.

Thesaurus
alluvion, alluvium, ash, ashes, bones, brand, calx, carbon, chaff, charcoal, cinder, clinker, coal, coke, coom, culm, deadwood, deposition, deposits, diluvium, dishwater, draff, dregs, dross, dust, ember, feces, filings, froth, fume, garbage, gash, grounds, hogwash, husks, lava, leavings, lees, loess, moraine, offal, offscourings, offscum, orts, parings, potsherds, precipitate, precipitation, rags, raspings, reek, refuse, scoria, scourings, scrap iron, scraps, scum, sediment, settlings, shards, shavings, silt, sinter, slack, slop, slops, smoke, smudge, smut, soot, stubble, sublimate, sullage, sweepings, swill, tares, wastage, waste, waste matter, wastepaper, weeds