Same as "no dice".

An outright refusal, denial or rebuttal; essentially, shorthand for 'no fucking way'. Also can mean no luck, plans fell through, and not going to happen.
Joe: Hey Johnboy, can I borrow a cigarette?
Johnboy: Negadice!

Hey, party at your house tonite. Negadice.
by PM March 11, 2005

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