A word standing for fucked by an overweight dude typically used when you absolutely destroy someone is a sport or game such as dunking on someone is basketball or whooping someone in Valorant.
An abbreviation for "Quickly Wear the Face of the Devil", a webnovel written in 2015 by Fengliu Shudai and beginning (unofficial) translation in 2017 by Keztranslations
Bro1: God that one extra for FOD was fucking wild bro. I don't wanna see that.
Br02: Bro what were you expecting from something called "Honeymoon on Beastman Planet"? You consented to this.
This is basically someone with a massive forehead, hence 'mega fod'; it's clearly the biggest of all foreheads.
Fods may be shiny, wrinkly, or 2 ft long.