Ginormous

Definition: (from dictionary.com)
-adjective
1. informal. extremely large; huge

Examples:
"The portions at the restaurant were ginormous; one plate could have fed the entire table!"
"The bill for this wedding must be ginormous."

Origin: (from etymonline.com)
"1948, perhaps originally military colloquial, from a merger of gigantic + enormous."

Awkwardness rating: 7

Glad I'm not footing that ginormous bill. (patheos.com)