gigantuous 

Of exceedingly large size.

That girl's booty is gigantuous!

gigantuous by baachou October 12, 2008

Gigantormous 

to exaggerate how enormous and gargantuan something is.

Andrew the caveman was eaten by a gigantormous T-rex.

Gigantormous by i dunno iono oreo April 19, 2010

gigantolongo

masculine adjective, derived from the tex-mex language in the late 2010's; meaning one that has a huge and long one.

My boyfriend has a gigantolongo cock

gigantolongo by Isabella Belleveu December 30, 2010

gigatonic 

A form of measurement used by mostly “youngsters” or “millennials” to show how large something is when all other words have failed in expressing how big said object or action is.

Person 1: Yo man! Last night she gave me the gigatonic succ it was so extreme!!!

Person 2: That succ had to be quite the deal if you had to use “gigatonic” to describe it.

gigatonic by Kelpflakes October 29, 2017

gigantoid 

Massively large, obnoxiously big, obscenely apparent

That bitch was gigantoid.
That blows a gigantoid pee pee.
That boiler on my chin is fucking gigantoid. (In reference to a zit)

gigantoid by Hybridrocknroll May 24, 2005

gigantonormous 

Bigger than Gigantic and Enormous put together.

Supremus is Gigantonormous!

gigantonormous by wangfudreco July 15, 2007

Gigantor

A robot-anime which was made in 1963. It was a pretty popular anime back then.

Kevin: My dad used to watch Gigantor when he was a kid.

Gigantor by Kevin Aparicio October 11, 2005