I had four vodka drinks last night and then got Alcoholzheimer's Disease. I don't remember driving home, or stopping at Del Taco before getting home, or eating them when I got home - hey, was that guy I was talking to last night any cute?
You talk to somebody at a party at length about life, the universe, and everything. Weeks later you see the same person again in "normal" life, you can't remember a thing you said or talked about, or even if you've ever met at all. The only lingering sensation is one of embarrassment from the possibility that you mispronounced the word "lambatse" multiple times. This is a symptom of Alcoholzheimer's Disease. See a doctor.
When you consume a large quantity of Alchohol and forget events during the time frame you were intoxicated, either intentionally or unintentionally. Usually this is followed by an apology to those offended.
"Dood, my ol lady told me you were hitting on her last night"
"Man, I sure don't remember anything like that, either that beotch is lyin like a rug or I might have some Alcholzheimers goin on.