Biganstrous 

The combination of big and monstrous that describes something something so large, it's beyond big and monstrous.

Wow! Look at that biganstrous boulder! Her butt is so biganstrous.

Biganstrous by M. Smelser January 12, 2005

bigantious 

A super big person, place or thing

You are looking bigantious today

bigantious by Bigantiouscreator July 30, 2023