2. saying you're going to do something but in the end not doing it; making promises without keeping them; flaking out
as 行く行く詐欺, etc.; modeled from オレオレ詐欺
それ引退詐欺と違って、辞めると言ったらマジで辞めるやつだろ。That's not one of those fake retirements; he's the kind of guy who really quits when he says he will.