A derogatory term for the stereotypical "rag head" (which is also a derogatory, stereotypical term). It is derived from the combination of "Baba Ganoush" and Douche Bag.
Baba Ganoush is a dip made from eggplant and is very popular in India.
It is a modern, Middle-Eastern-aimed version of "Kraut" or "Limey" but with the very cool and useful "douche" added to the end.
Loud-mouthed, drunk tourist to a pair of Indians on the streets of Calcutta:
Hey! Haji, Baba Gadouche: Where's f-ing Johnny Quest? You guys suicide bombers, or what? Where's Mama Gadouche, anyway?
Of course, these guys do not know much about world events or anything else, obviously.