pissfitness

Being able to handle your drink so well, that you become immune to drunkenness. The level of 'smashed' can no longer be reached.

These types of people do not get drunk. They get piss fit. The more years in which they spend being piss fit, increases their pissfitness.

Boyfriend: "You drink too much"
Girlfriend: " I'm raising my level of pissfitness OK"?