Xerneal 

A dangerous physical form of autism that uses full caps in sentences and mostly found lurking anime forums and servers

Person 1: OMG LOOK AT MY NEW SHOES XD
Person 2: Dude you just went full xerneal mode

Xerneal by Trash Lord June 22, 2017

xerneas

To smash someone in the anus with a pumpkin

I xerneas(ed) him so hard he could not shit for a week

xerneas by Chubby McGiggles October 19, 2013

Xerneas

A legendary Pokemon that first made it's appearance as the box legendary of Pokemon X on the Nintendo 3DS. It is a fairy type Pokemon and it is seen in the games to represent life. It is part of the Aura Trio, alongside Yvetal who represents destruction, and Zygarde who represents order.

"Who's your favorite legendary?"
"It's a difficult choice, but I'd have to say Xerneas."

Xerneas by Karma Akabane (Avocado) July 25, 2018