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Collying (or to colly) is done when you arrange an event/night out etc and someone who has agreed to go bails last minute with a poor excuse that you can't challenge, usually you'll get a pre bail text, and normally it's the same person in your group of friends.
Me "You still coming out tonight or are you Collying us again"
Him "yeah probably, I'll have to let you know"
Me "What do you mean probably?"
Him "well I'm trying to sort a babysitter out"
Me "Don't Colly me"
**20 mins later**

Him "Really sorry mate gonna have to let you down tonight can't get someone to look after the kids" or some equally weak excuse
by Mrmyke00 October 09, 2014
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