"Unus Annus" (lat. = One Year) was a one year project made by Crankgameplays, as Unus, and Markiplier, as Annus.

The point of Unus Annus was to make memories, enjoying the moment you had and in the end, remember death. (Also worth noting: Memento Mori = Remember Death)

They would upload a video every single day for one year ans delete the whole channel, after the clock stopped ticking.
A: Hey did you watch Unus Annus?

B: Yeah I did! It was so cool! My favourite video was Pee Sauna!

A: Oh yeah that was a good one! I liked "Mark knows what Ethan did" the most tho. Oh by the way, are you an Unus or an Annus?

B: Oh, I'm an Unus. And you?

A: I'm Norbert actually.

(Norbert Mooses was a fusion of Mark and Ethan)
by Vaniffective November 3, 2020
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One year in Latin, also name of a youtube channel that will be deleted in one day. Latina est stultus. Also if you put that into google translate, for some reason it says "English is stupid" when it actually means "Latin is stupid".
Markiplier and CrankGameplays made a channel called Unus Annus, that is probably already deleted.
by Jon Jacob Jingleheimer Schmit November 11, 2020
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Unus Annus means one year in Latin. Unus Annus was also a YouTube channel created by Markiplier and CrankGameplays. That channel was only up for a year. Throughout the year they did stupid stuff together and they made a lot of people happy. Once that year was up though, they deleted everything of that channel. If you are a future generation reading this I am sorry you didn't get to experience or even know the channel Unus Annus. They made the channel in 2019 and ended it in 2020.

Memento Mori
“Man.. Do you remember Unus Annus? And when Mark taught Eef how to read?”
by Marshmallow Glitch December 15, 2020
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Latin for One Year.
Also a YouTube channel that deletes itself after a year.
Often used with Momento Mori, Latin for Remember Death.
Some commenter: Imagine if Unus Annus is actually made in 1985. Memento Mori
Internet Troll: Dude what is Unus Annus, I've never heard of that before
by FishlandicFishy December 27, 2021
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If you're looking this up, you're wasting your time. The clock reached the final hour long ago. Unus Annus was a beautiful piece of art in history that will forever be lost to time.

For those still mourning the loss, I have a few words from the painters of the magnificent piece.
"Don't cry because it's over, cry because it happened." -Unknown: Nov 13, 2020
Friend: Unus Annus is really gone, isn't it.

Me: It was destined to be this way. We knew this. Momento Mori, my friend.

Friend: Momento Mori.
by Crying_Inside November 17, 2020
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If you're looking for the definition.. you're too late. You wouldn't get it.
Kevin: Do you remember unus annus?
Jackson: What's that?
Kevin: *sigh* you wouldn't get it.
by idiotstick19 November 15, 2020
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