By City A.M. Comment Desk Offender: Put a pin in it Every one of us has been an email chain which is borderline unintelligible for the amount of corporate lingo thrown in there. At City A.M., we’re taking a stand and calling out the worst jargon which travels around the City faster than you can drink an overpriced pint. This week: Put a pin in it What does it mean?To come back to something at a later date. Like putting a pin in a pin board. What does it really mean?We will never address this again. Like putting a pin in a balloon. (See also: circle back) Who uses it?Manic managers who don’t ha…