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A person who moved out to San Francisco during the Internet gold rush at the turn of the 21st century, roughly in the year 1999.

It is a play on the term "Forty-Niners," which refers to people who moved out to San Francisco during the gold rush around the year 1849.
Yes, I did come to San Francisco in August of 1999 to work for pets.com, but I find the term "ninety-niner" offensive.
by NYCDavid July 22, 2012
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
A person who has exhausted all ninety-nine possible weeks of unemployment benefits.
"Tier 5 to Survive" has become the rallying cry of the "ninety-niners", those unemployed who have found themselves jobless for the longest period of time and have nearly or already exhausted all ninety-nine possible weeks of unemployment benefits.
by paulchristenson December 19, 2010
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3
A Man who Engages in Sexual Intercourse With Other Men
Usually This Term Refers To All Nazis.
Hey Look at Those two Guys kissing,they must be Ninety-Niners
by Corey Bloom October 22, 2006
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