pigeon drop n.
[mid-19C+] (US Und.) a confidence trick that involves dropping a wallet where a victim can find it or a scheme in which the con-man tells the victim that they have found a large sum of money and, if the victim will advance some money as a show of good faith, they can have a share in the ‘windfall’.
[mid-19C+] (US Und.) a confidence trickster.
[mid-19C+] (US Und., also pigeon drop, pigeon game, dropping the pigeon) playing any form of confidence trick.