to gesticulate, to wave one's arms about
Essaie de gesticuler un peu moins.
Try to gesticulate a little less.
N'importe qui peut gesticuler et donner le tempo.
Anyone can wave their arms and keep time.
— Whiplash (2014)
Je te vois ramasser les oiseaux, gesticuler, parler tout seul.
I see you picking up birds, gesturing wildly, and talking to yourself.
— Manon des sources (1986)
Stop gesticulating!