verb

donner un coup de canif dans le contrat

/dɔ.ne œ̃ ku d(ə) ka.nif dɑ̃ l(ə) kɔ̃.tʁa/

verb/dɔ.ne œ̃ ku d(ə) ka.nif dɑ̃ l(ə) kɔ̃.tʁa/

To have a bit on the side (an affair)