slag
noun
[ slaɡ ]
• stony waste matter separated from metals during the smelting or refining of ore.
• "the burning liquid iron was forming a scum of slag"
• a woman who has many casual sexual encounters or relationships.
slag
verb
• criticize (someone) in an abusive and insulting manner.
• "the film has been slagged by many critics for its improbable plot"
• produce deposits of slag.
• "most of the other contained materials are slagged"
Origin:
mid 16th century: from Middle Low German slagge, perhaps from slagen ‘strike’, with reference to fragments formed by hammering. The verb sense ‘criticize’ dates from the 1970s.