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A common term used to describe fire engines, when using a Cornish accent. I love the Cornish. Anyhoo, this is also a way to taste the drunkness of a friend, by seeing how many 'gin' sounds are added on the end.
Stan: Are you drunk, Jimmy?
Jimmy: I don't know.
Stan: Say 'foire engin'.
Jimmy: Foire engin-gin-gin-gin-gin-gin-gin.
Stan: Drunk fool.
by Stephen W. Thomas May 06, 2005