Top definition
quite amazing; comparable to the mythical creature, the "unicorn;" having or sharing characteristics of a unicorn quite swimmingly.

may also be a word to explain what happens every time someone drops a log on their foot (because everyone knows, every time you drop a long on your foot, a unicorn gets a horn!)
1) that turkey sandwich of yours is unicorntabulous!

2) narwhals are freaking unicorntabulous!
by --iv May 28, 2009
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