Green’s Dictionary of Slang

pool v.

[? the image of tossing someone into a swimming pool; SAmE pool, to place resources in a common stock or fund]

(Aus.) to involve someone in, to implicate, to inform against.

Show quotations
[Aus]W.H. Downing Digger Dialects 19: Pool, to involve; cast blame or a burden on.
[Aus]‘William Hatfield’ Ginger Murdoch 239: I’d a’ let these coves go before I got through convincin’ you, only they bin an’ pooled a friend of mine.
[Aus]L. Glassop We Were the Rats 133: I haven’t forgot what he did ter me back at Bathurst; how he pooled me with the Q.M. Just a top-off merchant.
[Aus]K. Tennant Joyful Condemned 233: She was going to spill everything to him [...] She would have pooled you too.

In phrases