n. & v.
--n.
1. vitreous refuse left after ore has been smelted, dross separated in a fused state in the reduction of ore, clinkers.
2 volcanic scoria.
3 sl. derog. a a prostitute or promiscuous woman. b a worthless or insignificant person.
--v. (slagged, slagging)
1. intr. a form slag. b cohere into a mass like slag.
2 tr. (often foll. by off) sl. criticize, insult.
Phrases and idioms:
slag-heap a hill of refuse from a mine etc. slag-wool mineral wool.
Derivatives:
slaggy adj. (slaggier, slaggiest).
Etymology: MLG slagge, perh. f. slagen strike, with ref. to fragments formed by hammering