You are wrong, Zach. (the guy who posted above me) A ghost is someone who has passed away, but got stuck on earth. A ghost doesn't know that they are dead. A ghosts energy can vary from cold to hot. A ghost can't physically harm you. A Poltergeist on the other hand can be very physical and violent. A spirit knows they are dead, a spirit can be anything from a demon, an angel, a messenger, etc. A spirit can even be God himself. Check your Facts Zach. I been doing Ghost/Spirit study for quite some time. Usually in a ghost or spirit case, you can order an Excorist, or one of my cherokee brothers, such as a Shaman.
I lived in a house haunted by a Poltergeist for 2 years when I was little. (True Story)
by demmaster June 17, 2004
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for a collage or university residence, when you have roommate that you hardly ever see and are always unaware of anything about that person.
holy shit ghost is back.

my roommate is a ghost.
by duffbeer69 November 5, 2010
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A Covenant vehicle in Halo, also known as the Type-32 Rapid Assault Vehicle. It is highly maneuverable, fast, and deadly. But it can be destroyed easily. In campaign, it can be piloted by Elites, Marines, Grunts, and Spartans

UNSC equivalent: Mongoose
Brute equivalent: Chopper
"Ghost inbound!" -UNSC Marine
"Get a rock lock on that Ghost!" -player (rock lock is a tracking rocket)
"God*Warthog horn*it, f*Warthog horn*ing Ghost!"
by an elite April 20, 2009
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A term meaning you're leaving. Similar to "outta here."
I don't like those people you invited over so I'm ghost.
by Nathan Tiberius July 2, 2007
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(v.) to take someone's item in any of the iterations of Mario Kart using the Boo item.
Mario Karter: Haha! I just ghosted your 'shrooms, bud!
by Babyface Killah February 10, 2009
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(Verb) In order to ghost a girl, you must begin having anal sex with her against a window. After a little while, pull your dick out and allow your waiting friend to insert his. This must be done quickly so that the girl is unaware. Then sneak outside, and suddenly press yourself against the window, making the girl think she is seeing a ghost. Recommended that you do this only if you intend to break up with the girl in the near future
I wanted to break up with Jane, so I asked Dan to help me ghost her
by J-slicket April 23, 2006
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This occurs when a person goes "offline" on Facebook but continues to creep and look at pictures.
H: I saw you updated your status.

K: How? You weren't online.

H: I was ghosting..

K: Creeper!
by CrossCountryFool15 August 11, 2010
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