The tendency to back in a car, so that the license plate is not visible from the road, due to possible legal problems with the plate, (or lack of plate).
v. Black In: To only be lucid in parts of specified period of time.
Blacking In: parts of the evening when one comes out of a black out for a brief period of lucidity, and your brain begins to record and process information again. Usually followed by another period of blacking out.
So suddenly I blacked in, and I was in this hotel room with 2 naked chicks. I looked in the mirror and i said to my brain "Please, please, PLEASE!!!, DO NOT black out again!!!"
the moment in time when you are out so late that you "wake up" from being blackout drunk. often you will be confused about your surroundings and unaware what occurred in the last few hours.