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1.
A quick, often temporary, sense of satisfaction a person feels after seizing an opportunity to buy the latest and greatest bright shiny object that hits the market.
"My wife suffers from magpie syndrome and gets her 'magpie fix' when she sees bright shiny objects and then buys them."

"Chris gets his 'magpie fix' every time he uses his credit card"
by Maggie the Magpie December 17, 2009