grobongous 

Cool

My shirt is grobongous

grobongous by Redsoxnayshon December 13, 2017

Gibongous 

Very big. Huge. It's a mix between the words giant and humongous.

Her head was just, big... but her tatas were gibongous!

Gibongous by k-fred September 11, 2007

gibongous 

A) Extremely enormous, bigger than normal. Usually used to described a guy who's penis is either over girthed or extra long.

A) opposite of tinnie winnie short short dick!

Daaaamn Luke, your wanker was gibongous!

gibongous by dalethefarmer August 4, 2007