A Latin phrase meaning 'the Year of Disaster'. This can also be interpreted literally as 'the horrible year' or 'a horrible year'. However, the solemnity surrounding the common use of this phase, in conjunction with the inflection typically given it, implies the definitive nature of the year. That is, Annus Horribilis is the worst year, the year of horror, disaster, and calamity. This distinction is with respect to the speaker's own experience. That is the worst year of one's life imaginable. In general, people die or suffer fates worse than death.
"2020 was bad, but 2021 was my Annus Horribilis. I was so burnt out by my engineering school that I turned to alcohol abuse to battle depression and suicidal thoughts. While planning our wedding, my fiance dumped me and as a result, I lost my perspective job working with her dad. As a result, I dropped out of school, guaranteeing another full year and a half of a school I hate, for a total of six years to get a Bachelor's Degree that I don't even want anymore. On top of this, a philosophical role model of mine died and turned out to be a sexual predator, my Mom spent months in and out of surgery, an Aunt and Uncle are getting divorced, and I have developed social anxiety to the degree that I find it extremely difficult to be around people for any amount of time, to the point of legitimate fear on many occasions. I now have lost all sense of peace, joy, and purpose.

Annus. Horribilis."
by DuctTapeForever February 5, 2022
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They’re gone. You know that their gone. We need to move on. You need to move on.
by izumis_vibezz May 27, 2021
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20 years from now
Son: Hey dad what’s Unus Annus
Dad: Momento Mori
Son:?
by FrozenWaffle November 6, 2020
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Unus Annus is latin for ”One Year” and was the name of the now deleted channel made by Mark Fischbach (Markiplier) and Ethan Nestor (Crankgameplays). I also grew emotionally attached to it.

Memento mori my friends.
Mark and Ethan-Memento mori, Unus Annus.
by SwedishYoungGlucoseGuardian November 24, 2020
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"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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