to screw (someone over), to mess up
Le plan c'est d'aller à Morro da Sinuca et de niquer Madruga.
The plan is to go to Morro da Sinuca and fuck Madruga.
— La Cité des hommes (2007)
Je t'offre les Knicks et de niquer.
I'll give you the Knicks and fuck you.
Je ne sais pas encore comment, mais je vais te niquer un jour.
I don't know how yet, but I'm going to fuck you up one day.
— Running Man (2025)