Real Dictionary

brandish
verb: If you brandish something, especially a weapon, you hold it in a threatening way.

brandish in American English
the act of brandishing something
to wave, shake, or exhibit in a menacing, challenging, or exultant way; flourish
noun: a flourish or waving, as of a weapon
transitive verb: to shake or wave, as a weapon; flourish

brandish in British English
to wave or flourish (a weapon) in a triumphant, threatening, or ostentatious way
noun: a threatening or defiant flourish