baratiner

to sweet-talk, to flatter, to butter up

b a . ʁ a . t i . n e
baratin nonsense, spiel + er Infinitive
verb Rare #44,065
to sweet-talk, to flatter, to butter up Informal; often implies talking at length in order to persuade or distract someone.
FR: Il essaie de me baratiner pour que je lui prête ma voiture.
EN: He’s trying to sweet-talk me into lending him my car.

Marcinho, arrête de baratiner.

Marcinho, stop talking.

— Troupe d'Élite : l'Ennemi Intérieur (2010)

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.