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1. A person who is overly obsessed and easily excited with the hit TV show, LOST.

2. A degree of fandom only attained by knowing way too much info about the show LOST.
"When I mentioned the Dharma Initiative, she was a total Lostie and knew everything about it!"
by SNLfanforever February 11, 2010
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2
Someone who has absolutely no fucking clue what's going on half the time, or simply doesn't care.
mate 1: Hey mate, you still coming on Friday night?
mate 2: ......what?
mate 1: you know? Friday night?
mate 2: .....huh?
mate 1: fuck, you're such a lostie
by Lostiecunt December 19, 2015
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1.The people who were on Oceanic 815 when it crashed. *Note: The people who were in the tail section of the plane are called "tailies"*

2.Someone who is completely obsessed with LOST.
1.Jim:Who is that guy ?
Sara:That's Dr.Jack Shephard, He's a lostie.

2.Johnny:Who is that girl? She knows everything there is to know about LOST!
Lucy: Oh, that's Lindsay. She's a total lostie!
by ElleDee March 30, 2008
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4
1.The people who were on Oceanic 815 when it crashed. *Note: The people who were in the tail section of the plane are called "tailies"*

2.Someone who is completely obsessed with LOST.
1.Jim:Who is that guy ?
Sara:That's Dr.Jack Shephard, He's a lostie.

2.Johnny:Who is that girl? She knows everything there is to know about LOST!
Lucy: Oh, that's Lindsay. She's a total lostie!
by LindsayDee April 01, 2008
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5
1. Someone who gets confused easily or unable to give reasons or explanations to something obvious or able.

2. It can also mean a person who mentions something then suddenly loses focus at what was being said or unable to cope or understand the situation or meaning.
I have a friend Rowena, she started talking about something then forgot what she was talking about, haha such a "lostie"
but then again she is very beautiful. and that makes up for it.lol
by m0oks March 04, 2008
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