his/her/its teeth
Il lui manque la plupart de ses dents.
He’s missing most of his teeth.
À qui vas-tu faire avaler ses dents ?
Whose teeth are you going to make swallow?
— Le Loup de Wall Street (2013)
S'il arrive complètement défoncé, je te jure que je lui ferai avaler ses dents.
If he shows up completely wasted, I swear I'll knock his teeth down his throat.
— Le Loup de Wall Street (2013)