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blue-arsed fly

British  

noun

  1. informal a blowfly; bluebottle

  2. informal in a state of frenzied activity

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Members of the public believe the blue-arsed fly was actually around much earlier.

From The Guardian • Oct. 8, 2012

I am rather taken, meanwhile, with the effort being put into finding the first appearance of "blue-arsed fly".

From The Guardian • Oct. 8, 2012