much ado about nothing
US /ˌmʌtʃ əˈduː əˌbaʊt ˈnʌθɪŋ/
UK /ˌmʌtʃ əˈduː əˌbaʊt ˈnʌθɪŋ/

1.
a great deal of fuss or excitement about something unimportant
:
•
All that arguing over who gets the last slice of pizza was much ado about nothing.
•
The media coverage of the celebrity's minor argument was much ado about nothing.