n.[U]

1. 炉渣，熔渣，矿渣
   Millions of tons of slag now go into building roads each year.

   每年有数百万吨炉渣用于铺路。

2. 火山渣

vt.

1. 使成渣
2. 【俚】辱骂；诋毁

vi.

1. 结成渣

n.

1. stony waste matter separated from metals during the smelting or refining of ore.
   ▸similar material produced by a volcano; scoria.
2. Brit. informal, derogatory a promiscuous woman.
   ▸a contemptible or insignificant person.

v.

1. [usu. as noun slagging] produce deposits of slag.
2. (often slag someone off) Brit. informal criticize abusively.