A misspelling of Millennial, usually referring to the Millennial generation (early 1980s to mid-to-late 1990s).
Facebook commentator: "I sure hate all these entitled, lazy millenials! Back in my day..."
Millennial: "Two n's. Millennial has two n's, gramps."
by Spam4Dan November 10, 2018
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Otherwise known as Generation Y, or the internet generation (iGen), Millenials are people born between the years of 1980 and 1995. Millenials are often "echo boomers" (their parents were part of the baby boom), and they are often extremely tech-savvy.
Bob is born in 1990 and carries his iPod around everywhere he goes. He can fix your computer in a heartbeat and texts his friends all the time. Bob's generation are known as the millenials.
by KylieBronte November 11, 2007
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A Millenial is someone who's only been torturing people for a thousand years

- Michael from The Good Place
Michael: These Millenials, they have no work ethic...
by babytalks December 31, 2018
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The gross generation that invented fidget spinners,dabbing,twerking and other cringey stuff
"Those fucking millenials are dabbing in front of me"
by yellowpork6969 November 23, 2017
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The act of thinking you know it all when you don’t, because you’re too young to know it all.

Alienating co-workers or people in general around you due to your arrogance and ego of “knowing it all” when you don’t.

The self-absorbed ideology of the meaning of life when you don’t know anything but what your few years on this planet has allowed you to learn.
His millenialism kept me from being able to truly connect with him as a proper peer.
by tahoegrasshopper April 17, 2019
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"WTF is wrong with people these days?"
"They are Millenials what do you expect, David."
by ap011osKID September 25, 2018
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