To talk a lot about doing something but never do it.
With this expression we refers that there is a lot of noise but in the end nothing is done, everything is artifice. It’s when there’s a lot of “blah blah blah” but little action. Or like when in a football game there is a player who does many pirouettes but at the moment of truth does not score any goal. Well, that, a lot of noise and few nuts.