2 definitions by Duck_Duck
by Duck_Duck November 17, 2019
A Latin phrase meaning, 'one year'. It is also a popular youtube channel created by Mark or also known as Markiplier. He likes to connect this with death and that everything comes to an end. This YouTube channel will eventually be deleted in one year from its creation.
"You should subscribe to Unus Annus."
by Duck_Duck November 17, 2019