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Doing a Jacko is that one friend who is always the last in a group at a bar/club in a round but has to leave before buying a round of drinks in return. He could be with a group of 4 to 5 people and everyone has bought a drink, but when it's his/her turn they either sneak out or make up some excuse for having to leave.
"Whose round is it lads"

"It's Dave's round, he said he was going to the toilet but I think he's pulled a jacko"
by Judgemental Prick May 29, 2015
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Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
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