A greeting used between members of a certain group. Initially part of a post that seemed to be accidental (purse post) it has been adopted by The 5000 members of the group.
A guy who stands on the corner specifically of a city street and sells counterfeit watches and other "goods" from the inside of his trench coat.
You've seen them before I doubt you need an example a guy that sells ill gotten merchandise on a corner from the sleeves and other areas of his trench coat is a mobile kiosk