When someone is asked to move over a little, is it idiomatic to use "shift"? I heard someone say (though of course not a native):

Shift a little forward.

I found it a little strange. Is it better to use "move over" in this context?

Just move over little.

And when just a single word is used (though it sounds a little rude)

Move.

Shift.

Or

Just move a little.

Shift a little.