cog fog 

AKA brain fog; cognitive impairment; period during which higher executive function is affected; difficulty thinking

It can be caused by many things. Commonly it is due to fatigue, physical duress, or intoxicants.

Generally it is temporal in nature. It comes and goes.

Summer heat and insomnia ganged up on me. After the cog fog hit forget writing, I couldn't even remember the day of the week !

cog fog by FichenDich August 29, 2017

Cogfoggit

/Adj./

When a person is beyond idiotic that they don't even notice their stupidity, so you feel the need to call them out on their foolishness.

“Gosh, Emily! Stop being such a cogfoggit all the time and start paying attention for once!”

Cogfoggit by —A March 11, 2017