panache (n.)

1550s, "a tuft or plume of feathers," especially as worn in a hat or helmet, from Middle French pennache "tuft of feathers," from Italian pennaccio, from Late Latin pinnaculum "small wing, gable, peak" (see pinnacle). Figurative sense of "display, swagger" is recorded from 1898 (in translation of "Cyrano de Bergerac"), from French.