Slang term for a sexual 'get-together' of 'fluffy' individuals. Basically a fat people orgy, it is monstrous and sweaty and looks like boiling meatloaf. However if you are a skinny or fit person, I suggest finding yourself in the middle of a Blorfast at one point or another
Frat boy 1-"Dude, I coulda swore I just saw two manatees porking outside!"
Frat boy 2:"Nah it was Beta house, they're hosting another Blorfast."