A product of smelting, containing, mostly as silicates, the substances not sought to be produced as matte or metal, and having a lower specific gravity than the latter; -- called also, esp. in iron smelting, cinder. The slag of iron blast furnaces is essentially silicate of calcium, magnesium, and aluminium; that of lead and copper smelting furnaces contains iron.
To form, or form into, a slag; to agglomerate when heated below the fusion point.
Same as Basic slag, above.
The dross, or recrement, of a metal; also, vitrified cinders.
I don't buy into you're on the slag heap when you're 40 or 50 or 60 or 70 or whatever. Joan Collins
I'm a bit of a slag... Some people don't think it's very nice, but I don't care... I've got hormones, and sex is there, so why not? Sex is good. Everybody does it, and everybody should! Robbie Williams
I hate it when people slag us off. We had done three tours during 1970 and we finished off feeling we had just about had enough. We had done so much in that short space of time, we were drained. John Bonham
It's really important to say this. Often the faith schools were founded before the state provided education. I want good education in this country so I'm not going to slag off faith schools. I think that it's important that people of different backgrounds and different faiths go to school together and many faith schools do that. Ed Miliband