Brouhaha
Etymology
Borrowed from French, where it is attested from the 1500s meaning "uproar." Its ultimate origin is uncertain, but one persistent theory traces it to the Hebrew phrase "barukh habba" ("blessed is he who comes"), supposedly mangled in medieval liturgical or stage contexts into a byword for hubbub. The theory is disputed, so the honest verdict is: expressive, old, and of unclear parentage.
noun · /BROO-hah-hah/
A noisy, overexcited reaction or commotion, often out of proportion to its cause.
What it names
A slightly mocking word for a public fuss — the uproar that is loud and dramatic but may amount to less than the noise suggests.
Example
A single misworded tweet set off a weekend-long brouhaha that everyone had forgotten by Monday.
Related idea
A kerfuffle is a smaller, more domestic fuss; a brouhaha is a louder, more public uproar.