Slag off

verb, slang

Definitions

Verb
  1. 1
    To purify by melting and removing slag. transitive

    "There is a lot of copper oxide, but I can remove that by melting everything and slagging it off."

  2. 2
    To talk insultingly to or about someone or something; usually one who is not present. Commonwealth, Ireland, UK, slang, transitive

    "There’s pressure to be a brand. I’m even locked out of my social media because I just get drunk and slag people off."

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