to get one's hands dirty
Les savants ne veulent jamais se salir les mains.
Scientists never want to get their hands dirty.
— Atlantide, l'empire perdu (2001)
Ça se touche la bite avec la chemise pour ne pas se salir les mains.
They touch their penises with their shirts so as not to get their hands dirty.
— Cinema Paradiso (1988)
Tom ne veut pas se salir les mains.
Tom doesn't want to get his hands dirty.
Personne pour se salir les mains.
No one to get their hands dirty.
— The Dark Knight : Le Chevalier noir (2008)