Wiktionary
wave of the hand
n. (context idiomatic English) As if by magic.
Usage examples of "wave of the hand".
He bent eagerly over the nearest carronade, altered its elevation with a quick twist of the screw, and jerked the lanyard, with a wave of the hand to the other gun captains to do the same.
They rode effortlessly about our world, destroying all they came near to with seemingly nothing more than a wave of the hand.
Rhodan's impatient wave of the hand became discernible on the screen of the other set.
When he pulled to a stop the officer signalled him with a wave of the hand and pointed to the waiting troops.
Gaborn wondered if the wizard had warned the hares off with some spell, or perhaps something as simple as a wave of the hand.