It simply means having a left-handed grip on a bat or broom (left above the right)
"That boy is cockney-wristed" -- Old Glesga Granda
Arse (aboriginal).
Person 1 : that jindol took it right in the binung.
Person 2 : in ya.
Person 1 : only gammin.
It's an aggressively homosexual aboriginal that attacks you (in the binung) while you are unconscious. The nightmares that follow is what they call the Dreamtime. You may encounter it during a coroboree.
Person 1 : are you OK?
Person 2 : I feel fucked after last night's party.
Person 1 : probably that Rainbow Serpent mate, now you understand the dreamtime.