Also means
idiot, fool (informal)
Usage Note
Corniaud originally meant a dog of mixed breed, equivalent to 'mutt.' In everyday informal speech it also serves as a mild insult meaning a stupid or slow-witted person, similar to 'blockhead.' It was popularised by the 1965 French comedy film Le Corniaud starring Louis de Funès.
Examples
"Ce corniaud aboyait toute la nuit."
Natural Translation
That mongrel was barking all night.

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