Query

[bit3034]

In many movies I've seen people saying
How you doing?
so is it right to say that?

[Tullia]

In many movies I've seen people saying
How you doing?
so is it right to say that?

It's a colloquial (and grammatically dire) short form of "How are you doing?".
It's better avoided in formal situations, but fine with friends or family, I suppose, unless you are like me and a little old-fashioned about such things!