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Any kind of HALO 2 information.
"New HALO 2 information is non-existant."
by Megalith January 16, 2004
The person one becomes after being dumped or factored out of a relationship.
He was no longer on the list to be invited to the holiday dinner, he is a nonexistant.

A person is seen with another everyday for five years, then suddenly he is never talked about, he is a nonexistant.
by Sean Layman April 16, 2006