反咬一口

反咬一口

Literally means:

bite back

Actually means:

make a false countercharge; turn around and charge the victim

It figuratively means a person who has done wrong or committed a crime, instead of admitting his guilt or mistake, frames up or brings a false charge against those concerned such as the victim, the offence-reporter, those who caught or arrested him or the witness. It carries a tone of reproach. Derogatory.

比喻做了坏事的人，不但不认罪或认错，反而诬陷或诬告有关的人员，如被害人、检举人、抓他的人或证人等。含有指责语气。具有贬义色彩。