Story highlights Australian PM vows to "shirt-front" Vladimir Putin over MH17 at G20 summit in Brisbane

The term comes from Australian rules football and refers to an aggressive, front-on challenge

Many Australians have expressed dismay at the prospect of Putin's presence at November summit

Russian diplomats describe Abbott's comments as "immature," "offensive" and "insulting"

(CNN) The stage is set for high tensions between two of the macho men of world politics at a leader's summit next month, after Australian PM Tony Abbott vowed to "shirt-front" Vladimir Putin over the MH17 disaster.

"Shirt-fronting" is a term used in Australian rules football, referring to an aggressive, front-on physical challenge.

Abbott used the term Monday when speaking to reporters about the Russian President's attendance at the G20 Leaders' Summit , to be held in Brisbane next month.

Abbott told reporters: "Look, I'm going to shirt-front Mr. Putin... you bet I am. I am going to be saying to Mr. Putin, Australians were murdered. They were murdered by Russian-backed rebels using Russian-supplied equipment."

He continued: "We are very unhappy about this. We accept that you didn't want this to happen but we now demand that you fully cooperate with the criminal investigation, and if the criminal investigation identifies suspects that you have some influence over, they've got to be produced and justice has got to be done."

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