Referring to the Hunter wine region of NSW, Australia, "Up The Hunter" is used to describe someone who plans to get, or is, very very drunk.
Particularly if they are drinking wine, but could be used for any drink.
How many has Jen had?
I don't know, 4 or 5?
Bottles?
Yeah, she's up the hunter!
A phrase you use your friend hunter is annoying you too much
Hunter: Hey i got this cool ne-
Jake: SHUT THE HELL UP HUNTER