to sweet-talk, to flatter, to butter up
Je vais les baratiner pour avoir une chambre.
I'm going to sweet-talk them into giving me a room.
— Victoria (2015)
Te sens pas obligé de me baratiner, c'est tout.
You don't have to sweet-talk me, that's all.
— Monsieur Hire (1989)
Arrête de baratiner et dis-moi franchement ce que tu penses.
Stop talking nonsense and tell me straight what you think.