like a blue-arsed fly

like a blue-arsed fly

BRITISH, INFORMAL, VERY RUDE
If you do something like a blue-arsed fly, you do it very quickly and without having much control. I ran around like a blue-arsed fly, packed two suitcases and a trunk, and left everything else.
See also: fly, like

like a blue-arsed fly

in an extremely hectic or frantic way. British vulgar slang
The ‘blue-arsed fly’ referred to is a bluebottle, well known for its frenetic buzzing about.
1998 Rebecca Ray A Certain Age I'm not going to run around like a blue-arsed fly pandering to you and your bloody room, alright?
See also: fly, like