Green’s Dictionary of Slang

arsehole v.

[one is fig. ‘kicked’ in the arsehole n. (1)]

(Aus.) to dismiss, to get rid of.

[Aus]W. Dick Bunch of Ratbags 153: When yuh get a bit old and yuh can’t keep up with the younger stickers that yuh’ll be workin’ with, they’ll arsehole yuh.
[Aus]D. Ireland Burn 125: Yet they want to clear us right out. Arsehole us completely.
[Aus]R. Beckett Dinkum Aussie Dict. 5: Arseholed: Has [...] everything to do with losing one’s job [...] Chairmen of Directors do not get arseholed from their jobs; they are sacked.
[Aus]G. Seal Lingo 155: Other terms for losing one’s job include to be arseholed; get the fuck; get the push; get the shove; get the spear (a shearing term, it seems).