a trick, scheme, or device that is used to attract publicity or attention, often by deception (e.g. by downplaying something that is not immediately apparent);
e.g. The news story was staged as a gimmick to sell more newspapers.
(noun)
a mechanical gadget or device that executes some clever and/or dishonest function, especially a device that is used to secretly manipulate gambling apparatus;
e.g. They used a gimmick to cheat in a game of poker.
(verb)
to enhance, influence, or alter something with an extra feature or device, often one employing some trickery;
e.g. She tried to gimmick the system to gain an unfair advantage.