situational obliviousness 

The opposite of situational awareness. Having no clue what's going on around you. Straight-line thinking - aware of your world and its goings ons only.

Sheila almost ran over a biker because of her situational obliviousness.

Mike called the boss a stuck up turd when he was right behind him. That situational obliviousness has him working the weekend.

situational obliviousness by testicles...that is all May 18, 2011

Oblivion 

The fourth game in the Elder Scrolls series, and arguably the best game in the history of mankind. By purchasing this game, you have sold your soul to Bethesda Softworks--which is a pretty even trade-off, actually. Once you start this game--assuming your computer/Xbox 360 doesn't burst into flames of righteous fury due to it's lack of uberness-- you will not be seeing the sun for a while.

Side effects include: Weight loss, paleness of skin, weight gain, reluctance to leave your chair, death, peeing in a bottle, ordering pizza every night because you can't stop playing long enough to make some food, loss of the ability to distinguish between fantasy and reality

Because of Oblivion, I no longer have a soul!

God bless BethSoft for this gift to man.

Oblivion by Morrauk April 22, 2006

[Oblivite] 

When you invite someone to an event, because you know they will find out that you went with a lot of mutual friends.

Oblivite: Inviting someone to an event that you really don't want to come along, because you know they will find out everyone went.

"I had to oblivite Carol to the movies, because she would have seen all of our check-ins on Facebook. "

[Oblivite] by Dr. Brizzy December 11, 2016

Oblivion 

Something inevitable. We will all die one day and there will be no one to remember us. In a book, a man was afraid of oblivion, that no one would remember him when he dies. It is the state of being forgotten.

Augustus Waters is afraid of oblivion.

Oblivion by Tfios fanatic June 15, 2014

Captain Oblivious

A person, often otherwise intelligent, who routinely exhibits a comical lack of understanding in social situations.

Such a person is typically well-known for their repeated well-meaning tactlessness, failure to notice romantic overtures, tendency to walk into doorknobs and general forgetfulness.

"Blunt!"
"Cheerful!"
"Clumsy!"
"Absentminded!"
"Negative square root of two!"

By your powers combined, I am... Captain Oblivious!

Captain Oblivious by bliumchik June 3, 2009

Magnimus Obliviophallocytis 

Having an enormous penis, of which you are unaware of.

Also known as "Little Donny Disease", after the only person known to have this affliction.

Little Donny was diagnosed with Magnimus Obliviophallocytis, and due to this, must wear a special medical harness.

Magnimus Obliviophallocytis by jangocore October 28, 2010

Oblivion NPC 

Braindead and acts like a robot in actual human interaction

both of these traits are shared with an NPC (non-player character) from the video game "Oblivion" hence the name.
The NPCs in this game are infamous for having the dumbest conversations and acting extremely robotic, snapping towards you if you engage with them.
These people will act just like in the game and are generally very stupid.

Paul: hello friend, would you enjoy a cup of coffee and a sandwich at the cafe for lunch, it would very much please me.
Friend: you are such an Oblivion NPC

Oblivion NPC by bigbarrison September 15, 2021