noun. I think I've been here before...
Real citation: "Dejavu-istan"
(Aug. 30, 2008, Speak, Peppery, http://www.speakpeppery.com/?p=796)
Made-up citation: "For me, Mars will always be Dejavu-istan... I spent so many summers there killing warlords and blowing up moons. Also, the red planet has the best bed and breakfasts."