Xennial is a made up term by early millennials who wish they were GenX but cannot officially claim to be GenX.
I'm now a Xennial instead of a Millennial because I was born in 1983 but don't identify with my generation.
From the Latin "Stupendus-Comepingus"
Adjective
1. A word describing an individual so stupid, so willing to disregard tenets of common sense, that if you spend too much time around him/her, your brain will literally come out of your pipi hole.
2. State of being a fucktard.
The fucktardness is strong in this one.