Asgardian heavyweight
A person who can drink so much alcohol without showing physical signs of drunkenness that they would be considered a heavyweight amongst the Asgardians of Norse mythology.
John: Jimmy just finished a bottle of Jaeger all by himself! How is he still functional?
Jake: He's an asgardian heavyweight. He's probably just a little buzzed after that.
Jake: He's an asgardian heavyweight. He's probably just a little buzzed after that.