A long time ago I tasted an alcoholic drink which was green and tasted very sweet (possibly like banana, definitely not mint), and it had a long french name, something like (pesong, pisang, ...). Does anyone know the real name of it?
It sounds like you are looking for Pisang Ambon, a banana liqeur, which is seethrough and green. It is popularly served over ice, mixed with orange juice for a Tutti Frutti kind of drink.
Originally, the name for the drink we call the Grasshopper was Tujague’s, named for the New Orleans bar. Is that what you are looking for?