gigantasmic 

1. Gigantically Orgasmic
2. Amazingtastic

1. Oh man, fucking her was gigantasmic
2. Wow, i just owned him and that was absolutely gigantasmic

gigantasmic by the man December 28, 2004

Gagantastic 

Lady Gaga is fantastic. so that makes her Gagantastic
Gaga+fantastic=Gagantastic

Helene: Lady Gaga is Gagantastic
Helberth: ur so right... she is Gagantastic

Gagantastic by helene123 August 2, 2010

gigantastic

Term used to describe something gigantic and fantastic at the same time.

That park is gigantastic!

gigantastic by MACMAS October 30, 2013

Giantastic 

adjective.
A mix of combination between fantastic and giant, it can be used in either positive or negative.

BEHOLD! I have just encountered one of the most giantastic pencil!

Giantastic by anonymous January 17, 2022