The act of discrimination based on birth year occurring before or after the year 2000.
"The only good people in the world were born in the 1900's!"

"You're exhibiting millenniism/just being a millenniist"
by The Angry Viking March 26, 2010
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Alex: The president is doing a great job
Simon: The president should be fired
Alex: Wow millennial's sure are mindless sheep.
by C_K December 19, 2019
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to remove any substance such as intellectual complexity, subtlety, or sophistication in favor of perceived style or swagger; to dumb down to the lowest common denominator in an attempt to appeal to everyone as often displayed by the culture, music, and arts of the Millennial Generation.
1.) J.J. Abrams Millennialized Star Trek in 2009.

2.) Ah crap I'm not going to see the new Robocop. You know they are just going to Millenialize it.

3.) Jim: "Wow old school hip hop is so much different than today's steaming pile of crap. Their lyrics used to have meaning, coherent structure, and wow they even told a story! What the hell happened?"

Jane: "Ah you know right around the late 1990s when MTV changed from showing music videos to reality TV, the only music being pushed was that that would appeal to the most people possible. Artists had to Millennialize their music to appeal to a new generation of culturually bankrupt, brainwashed, socially media addicted youth."

Jim: "Ah that makes sense. That's why music in general is just god awful these days. Well what comes next?"

Jane: "Collapse of Western Civilization.

4.) Jim: "Wow look at the difference between comedians of the past and comedians now. Eddie Murphy, George Carlin, and Chris Rock were actually intelligent, edgy, and creative. How did utter lame ass morons like Dane Cook ever become popular?"

Jane: "Either Dane Cook was never that funny or he Millenialized his act."
by Intellectual Savior. January 30, 2014
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A person in Boomer comics who can't last a second without technology, never go outside, hate Boomers for no reason, fake depression, and whenever they are told or shown something that is related to "the good old days", they immediately make a connection to their "junk".
All these Boomer comics are just fake millennials looking at a book and asking "HoW dO yOu TuRn ThIs ThInG oN?"
by Teh Awesome God December 8, 2019
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A commonly mistaken term. A millennial is a person who is born in the year 2000 or above. This is why they are called millennials; because the year 2000 was the "new millenium".
Millennial: "I was born in 2001."
Non-millennial: "I was born in 1989."
by DannyDay95 April 10, 2017
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Millennials are people born during this current Millennium, if you're older than that, you're not a millennial. As of the 31st of December 2017 every single person that is not a millennial is over 18, therefore should know better.
"Whats the point in meeting up if you're not going to speak? Millennials are so antisocial, all they ever do is look at their smartphones."
by Kankeinai June 2, 2017
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