[Jonty30]

There is that, but it is also recognized by some gun experts to be reasonably accurate while you are shooting quickly.

I do not believe it started in the movies. It was popularized by movies, but I don’t believe it originated in movies or gangs.

Davis says it can be effective in the right situation.

The important thing is that you’re close enough to the target and that you have enough experience to hit it without having perfect aligned and centered sights. This takes a great amount of time in training and use with the weapon before you will be any good with flash sight picture.

https://www.quora.com/Gangster-1/Why-do-gangsters-hold-their-guns-sideways/answer/Joshua-Alexander-356?srid=hrof&st=ns

[Fai Mao]

It’s the way the gun came out of the box.

[higgmeister]

I'm sorry, but this does not pass the smell test, when person could more expediently and innately fire the pistol the usual way.   This gangsta pose ranks right up there with pants on the ground.

[DesertRhino]

There is that, but it is also recognized by some gun experts to be reasonably accurate while you are shooting quickly.

Nope... you will never see a single competition shooter, or business shooter do that. And it’s slower, both initially, and in recoil.

[Mogger]

If you want to see or learn how to shoot FAST, go to a S.A.S.S. shoot.

Single Action Shooters Society.

I've see shooters get off six shots from the hip and hit their targets so fast it was hard to hear the individual shots.