The process of questioning reality until you don't know what is real. This usually leaves the you extremely confused and disoriented. Inceptiown can be brought on by theorizing that life is a dream, questioning your own perception, and watching too many "psychological thrillers".
Guy 1: "DUDE! I just watched inception and... and... WHAT IF LIFE IS JUST A DREAM! AM I REALLY HERE? ARE YOU REALLY HERE!?!?!"
Guy 2: "Dude, you just got inceptiowned."