"La Javanaise" is a song written and composed by Serge Gainsbourg originally for Juliette Gréco, and interpreted by both her and Gainsbourg in 1963.
The title is a pun playing on the Parisian java dance and the javanais argot.
The song heavily employs unaltered French words that naturally have an ⟨av⟩ sequence; thus the lyrics resemble the argot.
In 1962, Gréco and Gainsbourg spent a summer's evening listening to records and drinking champagne in the huge lounge at 33, rue de Verneuil.
Gréco had debuted it in March 1963 by placing it at the beginning of her cabaret tour La Tête de l'art.