This occurs when some poor asshole attempts to grift you
and you know...you just know. So you decide to play along, then after a while you decide to BS them, and when they do their grift, you take off with their cash, your cash, their girlfriend, and their car.
Guy:Want to play some russian roulette?
Guy#2: sure, how many bullets in the gun?
Guy:ummm...1 *loads 6 into all chambers*
Guy#2:okay, how much money to the winner?
Guy: hundred bucks, you first *hands gun over*
Guy#2: *shifts out bullet before firing gun* dude, your turn.
Guy:Shit...He did a grift shift...*BANG*