G'day...

From the Aussie version above: (thanks Alan)

So it's hang yer jolly grog, yer hocussed shanty grog
The beer that is loaded with tobacco
Graftin' humour I am in, and I'll stick the peg right in
And settle down once more to some hard yakka.

The reference to tobacco here is in relation to the grog-sellers practice of adding tobacco to alcohol (hocussed grog), which would apparently knock you out. When the shearer woke up in the morning, he was told he had shouted drinks all around, and had spent his whole seasons paycheck on drinks in one not so memorable night. The process was referred to as 'lambing down' and is a common theme in Aussie folk songs.

Mark Gregory's excellent Aussie song site provides the musical notation, and he lists the song title as 'Across the Western Plains', he provides these notes:
First printed in the Bulletin in May 1916.
Reworked from a sailor's song 'Noggin Boots' or 'Across the Western Ocean'
This version from the singing of A.L.Lloyd who writes "Sung straight the song never seemed to me wildly exiting, but once I heard a drunken shearer named White sing it on a station near Bethungra NSW, in a way that would make the hair stand on end."

Cheers

aussiebloke