blacked out
getting so drunk/fucked up that you no longer are aware of what you are doing or whats going on. . . but find out the next morning because what you did was so obnoxiously funny it bares repeating
Example:
Man Brian, when you blacked out last night you were all over Tom's girlfriend. . . he was pissed!
Man Brian, when you blacked out last night you were all over Tom's girlfriend. . . he was pissed!