escória, resíduo industrial; (gíria ofensiva) mulher promíscua
1. The waste matter left after metal has been separated from ore in smelting; industrial residue
The factory disposed of slag from the steel production process.
A fábrica descartava a escória do processo de produção de aço.
2. Loose, unconsolidated rock material; gravel or broken stone
They used slag to fill in the pothole on the road.
Eles usaram escória para preencher o buraco na estrada.
3. (British vulgar slang) A derogatory term for a woman considered sexually promiscuous
This usage is considered highly offensive and derogatory.
Este uso é considerado altamente ofensivo e depreciativo.
4. (verb) To criticize or insult someone harshly
Don't slag off your friends behind their backs.
Não critique seus amigos pelas costas.
In British English, 'slag' as an insult carries significant offensive weight and is considered vulgar. In American English, the word is primarily technical/industrial. In Portuguese, the derogatory meaning is rarely adopted, with Portuguese speakers preferring other expressions for criticism. The industrial meaning is universal and neutral.
Related Idioms & Phrases
slag off (British): to criticize or speak negatively about someone
slag heap: a pile of industrial waste or slag
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