Origins found in Yorkshire saying 'coal-scuttle in the mouth', though shortened through Cumbrian slang.
Traditionally used as a reposte to an insult, equivalent to the unpleasant experience of physically trying to put a coal scuttle in your mouth.

Alternatively can be abbreviated to a simple 'Scuttle'.
"She told me I was ugly and that was a right scuttle in the mouth"

"Danny shagged my mum, what a scuttle."
by vianicolodi February 26, 2010
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