I work in Kent now and was asked for the origins of Mackem. Although I had a couple of theories is there a definitive origin for its use?
Only Mackems need apply
Only Mackems need apply
The term Mackem didn't exist until the mid seventies: before that everyone on Wearside was happy to be called a Geordie. 'Mackem' almost certainly originated as a derogatory term from Newcastle supporters who feared our growing support in their previous heartlands due to our success in the FA Cup in 1973.

Shipyards. We (Sunderland) used to mack everything, they used to tack (Scumbags) everything hence mackems & tackems.
We done the hard labour and technical bits and they did the poncey girly bits like fitting the curtains etc.

Dictionary definition of Geordie.
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[TD="class: word"]geordie[/TD]
[TD="class: tools, align: right"]http://www.urbandictionary.com/define.php?term=geordie#[/TD]
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[TD="class: text, colspan: 2"]Usually a person who believes they are from the city of Newcastle but are infact from outlining areas such as Gateshead, Hexham and the like. These 'plastic' Geordies tend to believe they are at the top of the social scale but are in fact in the middle of the social security benefit queue. Often found in Netto or more notably Greggs upon where they feed they offspring large quantities of baked pastry goods, children are usually christened "Keegen" or "Bobby" or "Alan" regardless of their sex, this is due to their Mother and Fathers (and in many cases 'Uncle Steve' and Uncle "Jeff" and 'wor Bobbies da") lifelong devotion to Newcastle United, despite never actually being anywhere near the stadium, but the 9 kids are dressed head to foot in Black and White replica kit 7 days a week.
"Hov corse ham a Geordie man like man, me da used ta drink Broon Ale and me ma uste te werk in Fennnikks man"
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I am a pit yacker if that helps

I don't need to take a quiz to know I'm a Mackem.
Where as you mark your self out with your **** patter and total lack of class as a Skunk.![]()
Do us all a favour, here... wear this polythene bag...![]()