Millennigan 

A gentleman's request to redo the last millennium.

So far, the 2000s have been a bust. You guys mind if I take a millennigan?

Millennigan by Lord Nexus VI October 10, 2010

Mixxennial 

The sub-group of "Millennials" born on the cusp of Gen X and the Millennial generation, whose cultural subtext & shared history straddles both generations. The Generation formerly known as Y.

"You know a mixxennial's a mixxennial when they refuse to admit they're a millennial."

Mixxennial by Eight of 19 October 15, 2016

Millennium adult 

An adult who was born in the new millennium (Born on January 1, 2000 or later). Typically, someone born in the new millennium becomes a millennium adult when he or she reaches the age 18 (In most countries).

Scott to Mom: Hey mom.
Mom to Scott: Hey my baby, happy birthday! I can't believe you're 17 you are growing up so fast!
Scott to Mom: Actually mom....I'm 18.
Mott to Scott: Wait, no you aren't.

Scott to Mom: Yes I am mom. I was born in 2000, not 2001.

Mom to Scott: Oh no...my baby is a millennium adult (vomits)_
Scott to Mom: Are you alright mother?

Millennium adult by MexicanJunior April 23, 2018

Millenielder 

An older person acting like a millennial

Dad put down the phone, you’re a millenielder

Millenielder by Traveler Gary July 30, 2018

billennial 

These are the next generation of Millennial Billionaires who will come to define the entrepreneurial world from here on.

Evan Speigel, founder of Snapchat made his fortune in the Multimedia Messaging App and came to be known as the First set of new age Billennial entrepreneurs.

billennial by AgentPDC June 16, 2020

light millennium

The distance light travels in 1,000 years, or 1 millennium.

1,000 light years is 1 light millennium. The Milky Way Galaxy is 100 light millenniums in diameter.

light millennium by He who knows11 September 14, 2019

Millenialtard 

a millenial who gets easily butthurt whenever someone mentions anything that's related to the 90's.

It can also be used as a comeback to the annoying famous: Ok boomer.

Random person: i remember growing up watching dragon ball z back in the early 2000's.

Millenialtard: OH SHUTUP YOU GEN-Z! YOU'RE TOO YOUNG BECAUSE YOU DIDN'T GROW UP IN THE 90'S!! REEEEE!!!!!

Millenialtard by ALL DAT ROOM THO?! January 24, 2020