Top definition
A state of mental confusion or forgetfulness that lasts longer than a brain fart or brain freeze. Can last daze (sic) to years.
Grandma seemed to be in a brain fog for a couple days last week.
by yes juanito yes March 06, 2015
Get the mug
Get a brain fog mug for your friend Sarah.
When you have such and amazing orgasms or set of orgasms, that your head feels like it is in a fog and you can't think straight.
Dude, my girlfriend has Brain Fog, she just got up after sex and walked into my wall.
by jkuile June 10, 2009
Get the mug
Get a Brain Fog mug for your dad Bob.