-- not!

[Gerald Cohen]

>>From George Thompson, Mon, 1 Mar 2004:
>
>We have batted about the practice of making a negative statement by
>making an affirmative statement and capping it with an emphatic " --
>not!"  I don't recall where we left it, and don't know how to find
>it in the archives.
>
>So --
>
>Here is at least a pretty early example:
>
>It Was Some Opening -- Not.
>Sporting News, April 17, 1913, p. 6, col. 4.  [Headline to a story:
>opening day games in some American Association cities were snowed
>out.]
>
>GAT
>
>George A. Thompson


Jesse Sheidlower wrote an article in American Speech on this topic.
The use of "...Not!" goes back to the 19th century.

Gerald Cohen