An adjective meaning the same as fantastic, but used when referring to Gackt.
Did you catch the Gackt concert? It was Gacktacular!
by Sugimura May 15, 2006
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A feeling of something immensly pleasurable, often as a result of slipping one into your mates milf-of-a-mothers snatch.
"Show me your wound Mrs Pattni, its Gacktastically Gacktacular." Mr Budniak exclaimed.
by Bud September 25, 2004
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