Most ambidextrous people are better at different things with a certain hand.
So... the term you are looking for is ambidextrous?
I'm mainly right handed, but can use my left hand for various tasks with variable proficiency.
Anything that requires more fine manipulation of digits, certainly requires my right hand. And I am terrible shooting left-handed (my body doesn't understand what to do, and I'm right-eye dominant). Same with batting, or opening just about anything.
But driving, if I'm doing it one-armed (most often the case unless the road is treacherous or very rough) I'm far better with my left arm (far more control is arm-based versus specifically the hand itself).
For more benign tasks, I can use my left hand effectively enough, but most often I can do it better with my right hand.
I wouldn't consider myself ambidextrous though, as most "important" tasks I cannot do well at all with my left hand. Driving is just about the only thing I specifically do left-handed the majority of the time, and probably because I simply developed the skill with that method because I'd rather lean ever so slightly toward the middle of the car than I would prefer to lean toward the door - I feel more out of touch with the vehicle when I'm far off center like that. That, and I like to have my right arm rest on the center console/fold-down middle seat, and free to operate controls.
If I learned to drive in a right-side-drive vehicle, I'd probably drive right-handed.