I feel like a prude, in there being a number of those euphemisms I don't recognize. "I'm going to put a sword in a stuffed boar's mouth"? "I'm going to overflow your pint glass"? "I'm going to miss the four ball"? Is Australia wrong, or am I?
I didn't get the boar or the snooker thing, but the overflowing, messy beer should be fairly obvious. You must've just missed the woman say "Sorry about the head" afterwards.
IT'S FROM MOTHERFUCKING NEW ZEALAND. NEW ZEALAND NEW ZEALAND NEW ZEALAND. I don't expect people to notice the accents but they do actually say the words New Zealand at one point.
The beer is a "head" joke, the boar is a pork sword and the pool thing is "missing the pink and sinking the brown".