Just launched! Learn slang while watching funny vids: urbandictionary.tv
1. banana oil
(archaic) Insincere or nonsense speech. This term is an example of 1920s ("flapper" era)American slang. Synonyms from the era include horse feathers and applesauce.
"He poured banana oil in her ear, telling her flattering sweet lies to lure her heart."
2. banana oil
an unbelievable justification for getting someone totally screwed