Goliathiac 

Someone who believes themselves to be a Biblical Tyrant, or the "Big Bad" antagonist of the real world

"James thinks he's a supervillain, when he's really just a Goliathiac," Said Emily.

Goliathiac by TheGuyWhoMadeGoliathiac March 7, 2024

goliathan 

an obscenely large amount or size.

Ammon: Man, i peed like 50 times last night.
Evan: Dude, you must have drank like a goliathan amount of mindoosky.

goliathan by Anvex January 20, 2011