Sainsbury's manoeuvre

When someone says they know a shortcut but it actually ends up being a longer route. Unnecessary and silly.

Anand: "Wait, I know a shortcut...take this left here...quick turn right again! Oh you were too slow, now we have to wait"

Cab driver: "What? You wanted me to take a left to miss to miss that traffic light and go through another traffic light?? What a silly man, what a stupid Sainsbury's manoeuvre!"