A term used in a podcast for a popular flash series "Unforgotten Realms". It is used when the new artist of UR says, or does something wrong. It has become a small catch phrase for various fans of the series, and is sometimes used when telling someone they did something bad.
Clive: Hey, man! I just sold my soul to satan!
Winston: Dammit Johnny!
by Mr. Bibby April 10, 2008
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