Etymology of Entomology: “Blue Arsed Fly”

Oxford Dictionary: Tracing blue-arsed flies and Bellinis

Most of us are familiar with the meaning of “running around like a blue-arsed fly”, but where exactly did this peculiar phrase come from?

Editors at the Oxford English Dictionary (OED) are appealing for the public’s help in tracing the history of English words and phrases such as this.

They want to unearth new information about the roots of English, including early examples of particular words.

Possible explanation.

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