to sleep, to crash (sleep)
Tu peux pioncer sur le canapé si tu es fatigué.
You can crash on the couch if you're tired.
Elle va pioncer jusqu’à Halloween.
She's going to sleep until Halloween.
— Once Upon a Time... in Hollywood (2019)
Tu veux pioncer chez moi ?
Do you want to sleep at my place?
Restez pioncer.
Stay asleep.
— Oh Boy (2012)