A drinking game where a cup of beer is set up then a shot of rum then a shot of vodka then a shot of tequila and finally another cup of beer.
All must be drunk in a row. Completion demonstrates a drinker's Iron Liver.
John: Dude you were totally F@%$#@ up last night.
Joe: I know man I was in the marathon.
John: Howdya do though?
Joe: Oh I've got an Iron Liver for sure.