beau geste(n = noun.act) - a gracious (but usually meaningless) gesture;
is a kind of gesture

beau geste, n. (pl. beaux gestes pronunc. same) a generous or gracious act.

Etymology:
F, = splendid gesture

beau, beau brummel, beau brummell, beau ideal, beau monde, chanson de geste, geste