lostee Share definition Flag A person, usually of the female persausion and quite young, who is completely retarded for the TV show "Lost". "I finally met another Lostee at my school. JATE, SKATE and PB&J kicks ass!!!!11" lostee by Raven O'Reilly January 31, 2006 0 0 Get merch Get the lostee mug. Buy Now — $32.95 See more merch