A great disturbance or uproar over a matter of little or no importance. Also 'tempest in a teacup' (British: 'storm in a teacup').
Examples:
- All that because a handful of the thousand invited guests didn't show up? What a tempest in a teapot!
Origin: Current American forms first recorded 1854
Synonyms: storm in a teacup, much ado about nothing