Banana-oil definition

(slang, former) Insincere talk.

A liquid mixture of amyl acetate and usually nitrocellulose, having a bananalike odor and used as a solvent or flavoring agent.

(slang) Insincere flattery; nonsensical exaggeration.

Amyl acetate, CH₃CO₂C₅H₁₁, a colorless liquid with a bananalike odor, used in flavorings, in making lacquers, etc.