How does my dad do it? Does this mean he's hardcore?
That, in and of itself, is meaningless. All it says is that he likes the taste of beer and after puking - he wanted something cold that would take the taste of vomit out of his mouth.
The Lord Humungus.
boot and rally, boot and rally
It means he's doing things I hope you don't or won't.
Your father is emotionally damaged, and cannot face life being sober. Yes, it means he is hardcore.
He's an alcoholic, not cool.
it means he is a very irresponsible father, and alcoholic