To be or do something/someone of asian greatness.
when some thing goes the way you whant it or is fricken sweet.
something ninja.
1. "Dude that party was Japtastic"
2. "His ride was Japtastic!"
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An adjective which encompases all that is great about being a jap. From juicy sweatsuits to baby blue BMWs from tiffany's charm bracelets to tacky J'adore Dior t-shirts.
Omg, have you checked out Rebecca Goldhorowitz's new cashmere Juicy sweatsuit? Throw that together with a pair of Tory Burch's and you've got yourself one japtastic outfit.
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