noun
ritual wand with streamers; ōnusa
A Shintō purification wand: a pole with linen or paper streamers, used in ōharae (grand purification) ceremonies. Archaic in everyday language but still seen in ritual contexts.
神主が大幣を振ってお祓いをした。
The Shintō priest waved the ōnusa to perform the purification.
noun
great demand; high popularity
Figurative use: something is so popular it's like a ritual wand being waved around. Often used in set phrases like 大幣を振る (to be in great demand).
新発売のゲームは大幣を振る人気だ。
The newly released game is in such great demand it's like an ōnusa being waved.