Green’s Dictionary of Slang

possie v.

[possie n.]

(Aus.) to claim for oneself.

[Aus]Sun. Times (Perth) 28 Aug. 4/8: ‘Gordstrikeme pink!’ growled the rorter, ‘if a crimson illegitamate ain’t bogged ’e’s body inter the pitch wot I possied at Kalgoorlie’.