Top Definition
An adjective used to describe something that is spectacular, awesome, cool, or otherwise great to the highest degree. A portmanteau word formed from the words spectacular and yam, the word yamtacular borrows from the greatness of that orange root that tastes so yummy.
Thank you for that yamtacular dinner; it was so good I want to vomit so I can eat some more.
by moonbug November 13, 2006
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