slaggy

noun

1. the fused refuse or dross separated from a metal in the process of smelting
2. lava resembling this
3. Chiefly Brit., Slang
   1. a worthless, contemptible person
   2. a sexually promiscuous woman

Origin: < MLowG slagge (> Ger schlacke) < slagen, to strike: for IE base see slay

transitive verb slagged, slagging

1. to form into slag
2. Chiefly Brit., Slang to criticize, disparage, or insult: often with off

intransitive verb