A quartz tipped tool or spear used by the aboriginal noongar people of South Western Australia, namely Perth region, to either hunt kangaroos or other aboriginals. The word stems from the Gidgegannup township north east of Perth, which is rife with abo crime and quartz mining.
Jim: "Where'd me fuckin 6 packa emu export gocunt?"
Joe: "Oi I reckon Davo took it, fuckin druggo"
Jim: "Get the fuckin Gidgees, we're finding that dickhead"
Someone whose motivations are persistently ambiguous and might be untrustworthy on the whole. The term is believed to have originated from that of a shiftySoviet scoundrel whom often auctioned himself off to overweight Italian sewage maintenance workers for reasons unknown.
"I just realized last night that David has been purloining all my finely smoked sandwich meats and padding the inside of his tighty whities with them. A true Gidrovlicheskiy, that feller is."