Gigantapoo 

A poo so large in length and girth it needs to be broken up to be flushed away. It is often traumatising to it's previous owner.

The gigantapoo has made me feel sad and sickly.

Gigantapoo by Dannijoy April 27, 2020

Gigantalous 

Commonly used to describe a female with a huge posterior. However can also mean big.

That A*** is gigantalous.

Gigantalous by TayoThatGuy August 9, 2019

Gigantopotamus

1. A humorous name, term, or term of endearment for a fat, or slightly overweight, person.

2. A humorous name, or term, for a morbidly obese person, provided they don't hear you.

Woman: "Does my bum look big in this?"
Partner: "Of course it does Gigantopotamus"

From the words gigantic and hippopotamus.
See: Chunkosaurus

Gigantopotamus by Goatlips August 5, 2008

gigantalous 

big bum

if you saw her bum it was scandalous got me making up new words gigantalous

gigantalous by DRAKE AND ADONIS6666 August 9, 2019

gigantamous 

really really big!!!!!

Like Ronni Stewart's Breastezzez(in Mr.Kev A's opinion)

gigantamous by Mr. Ad S. May 1, 2004

gigantanormous 

Incredibly large, something so large that Godzilla with a bazooka could not even scratch it.

The gigantanormous moth swooped Soulja Boy, scaring the bejeebus outta him.

gigantanormous by Inder-House December 9, 2008

gigantapenis 

a word used by those with unusually small penis's in a last ditch effort to sway any interested or uninterested persons that they do in fact have a larger penis than the size of most sticks of chapstick

John and Anthony were trying to tell these girls that they had a gigantapenis, thats so sad

gigantapenis by Justin M. February 2, 2005