What is a alcoholic blackout?

Answer 1

An alchoholic blackout is when, after drinking alcohol, your drinking you don't remember some or all of what occurred when you were intoxicated.

There are two forms of alcohol blackout. In one (en bloc) blackout, the person experiences amnesia covering the entire period of intoxication whereas in fragmentary blackout the person experiences partial amnesia of that period. The latter are more common than the former.

It is important that blackouts not be confused with being passed out or being unconscious. When people are passed out, they are not conscious of what is going on during that period of time. On the other hand, people who suffer a blackout are experiencing amnesia; they were conscious and aware of what was going on while intoxicated but now they can't remember what happened.