adj. Extremely and competely cool.
Dude, that's Mantasmagorical!
by Michelle June 5, 2004
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Amazing, majestic; anything that will pretty much burn your eyes if you look at it too long because its so awesome. Everyone strives to be classified as mantasmagorical. People who are mantasmagorical are basically the president of everything.
Customer: "Wow, I love that shirt... it's so mantasmagorical!"

Sales Lady: "So, you're buying one in every color then."
by rahquill May 7, 2011
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