Something so big, it's more than enormous.
The Tsar Bomba had a giganormous mushroom cloud. It was the detonated October 30, 1961 and is still the largest bomb ever detonated on record, lucky humanity!
by ksadya May 11, 2007
1 more definition
A mix between the words ginormous and gigantic!
Omfg her boobs are so giganormous!
by gawjusA July 31, 2009