slag (off)

slag (off)

1. To criticize or upbraid someone in a harsh, insulting, and abusive manner. A noun or pronoun can be used between "slag" and "off." Primarily heard in UK, Ireland. I wish the boss would offer some constructive criticism instead of just slagging us when something goes wrong. Each night, I can hear the woman next door slagging off her husband. The boss slagged my idea off in front of everyone at the meeting.
2. To tease, mock, or ridicule someone. A noun or pronoun can be used between "slag" and "off." Primarily heard in UK, Ireland. Ah, don't take everything so personally, I'm only slagging you! It took me a while to get used to the way Sarah's family slags each other off all the time. I had a feeling the other kids would slag off my clothes, but I didn't care.
Farlex Dictionary of Idioms.
See also:
  • not do (someone or oneself) any favors
  • rip (someone or something) to shreds
  • tear (someone or something) to pieces
  • tear (someone or something) to shreds
  • tear somebody/something to pieces/shreds
  • tear someone or something to shreds
  • tear to pieces
  • interpret for
  • interpret for (someone)
  • identify with