1) Some idiot in gray tights.
2) A real-world costumed vigilante who first appeared in the United States of America some time between 2012 and 2020.
3) An image of an ideal (original greek meaning).
If you want peace, prepare for war.
Serve life, liberty, and love.
Out of destruction, there is hope.
~ The code of the Eidolon.
by The Eidolon December 9, 2007
The absolute nicest, coolest, most talented person you will ever meet in your lifetime
Person 1: Have you heard about Eidolon?
Person 2: You mean the coolest person ever! Of course i've heard of them!
by eeeekin December 8, 2020
The Eidolon Wyrm is the strongest miniboss in the Calamity Mod. It has a lot of Hp and a high defense reduction. It is also a reference to the Ghost Leviathan from Subnautica. The Eidolon Wyrm can only be found in the Abyss Biome.
Person 1: Have you heard of the Eidolon Wyrm?
Person 2: Yeah. It's really hard.
Person 1:It definitely is.
by Origorath, The Mad God November 20, 2020
What happens when your body perceives a change in elevation and proceeds to make you think you are about to step up or down only to jar the experiencer into a self conscious awkwardness and sense of mistrust in their own perceptions.
I saw Marcus throw his back out during an "Eidolonic ascension/descension experience" while taking the stairs.
by CovidMessiah December 10, 2022