insane = 'amazing; hard to believe'

[Victor Steinbok]

I figured, it would go back at least to Crazy Eddie... or earlier

     VS-)

On 1/29/2014 2:21 PM, Jonathan Lighter wrote:
> CNN reports people in Atlanta have "insane stories of being stranded."
>
>   Not in OED.
>
> I've known this usage since 1970 at least, typically in the appreciative
> comment, "That's insane!"
>
> JL

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