flag-waver

[ flag-wey-ver ]
/ ˈflægˌweɪ vər /

noun

a person who signals by waving a flag.
an enthusiastic, demonstrative patriot.
a song or musical number intended to arouse patriotic fervor.

Origin of flag-waver

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019