Gargantuan, in modern times, means gigantic. Gargantuan is based on the the fictional king Garguantua, who was portrayed as having gigantic physical and intellectual appetites. The satire Gargantua and Pantagruel was written by François Rabelais, considered a great writer for his works of fantasy, satire, the grotesque, and bawdy jokes and songs.
Usage
See Special:Whatlinkshere/Etymology:Gargantua for a list of articles using this term.
This is an etymology page: a page detailing the origins of terminology used in the series in regards to real world culture and history.