I’ve had a horrendous two days after a party many times, especially after “Pitcher of Alabama Slammers” night.
I had a pretty bad couple of days after partaking in a drinking game in Lutjenberg, Germany on 12/30/79. My German friends were amazed that I could hang with them.
End result was at least 15 shots of Jagermeister and a few litres of fine German Pilsener. I wouldn't advise doing that today.