noun, verb, slagged, slagging.
1. the more or less completely fused and vitrified matter separated during the reduction of a metal from its ore.
2. the scoria from a volcano.
-- verb (t)
3. to convert into slag.
-- verb (i)
4. to form slag; become a slaglike mass.
[MLG slagge, c. G Schlacke dross, slag]
-- slaggy, adjective