Inauthentic 

Fake.

The chick was cool, but inauthentic.

Inauthentic by Solid Mantis June 17, 2018

Inauthentic 

Someone who doesn't follow any particular trend

He is doesn't follow any particular trend, he is quite inauthentic.

Inauthentic by Ambar Dutta March 2, 2018

Inauthentic Suspension

When your Twitter account gets banned due to your own abusive and/or threatening behavior, but you blame your rightful suspension on “single-purpose hate accounts” and/or “weaponized trolls/digital soldiers” who are out to get you. Often a sign of deep paranoia and persecution complex.

The guy who reported me brags about being a single purpose hate account and rejoices in my inauthentic suspension.

Inauthentic Suspension by WangYoGrunt May 10, 2023

Unauthenticated 

When your WiFi wil not authenticate and allow you to use it.

"Harry your WiFi Won't let me Authenticate!"

"Clive it's called being Unauthenticated!"

Unauthenticated by Ballah acbah July 29, 2019