slag
/slæg; slæɡ/ n
1 [U] waste matter that remains after metal has been extracted from ore by smelting 矿渣; 熔渣.
2 [C] (Brit derog sl 贬, 俚) woman who does not look respectable and is regarded as sexually immoral 贱妇; 淫妇. slag, v (-gg-) (phr v) slag sb off (Brit sl 俚) say offensive and critical things about sb, esp unfairly 侮慢或批评某人（尤指无理地）
Now he's left, she's always slagging off her old boss. 因原老板已走了, 她就一个劲儿地褒贬他.