What exactly is "mystery meat" ?!?!?

No one knows. Hence the mystery.

It usually has a bit of a green sheen to it though, if that helps you any.

Mystery meat is a disparaging term for ground meat products such as döner kebabs, Spam, Salisbury steaks, or any similarly prepared ground meat patty that comprises the main course of an American public school lunch, often served with gravy. This type of meat acquired the name because it is often difficult to identify its primary ingredient.

The term mystery meat is sometimes applied to meat products where the species from which the meat has come is known (e.g., cow or pig), but the cuts of meat (i.e., the parts of the animal) used are unknown. This is often the case where the cuts of meat used include offal and mechanically recovered meat, where explicitly stating the meat used might diminish the palatability of the product to some consumers. Examples include Spam, hot dogs, bologna sausage, and chorizo.

Mystery meat is a disparaging term for ground meat products such as döner kebabs, Spam, Salisbury steaks, or any similarly prepared ground meat patty that comprises the main course of an American public school lunch, often served with gravy. This type of meat acquired the name because it is often difficult to identify its primary ingredient.

The term mystery meat is sometimes applied to meat products where the species from which the meat has come is known (e.g., cow or pig), but the cuts of meat (i.e., the parts of the animal) used are unknown. This is often the case where the cuts of meat used include offal and mechanically recovered meat, where explicitly stating the meat used might diminish the palatability of the product to some consumers. Examples include Spam, hot dogs, bologna sausage, and chorizo.

dd

It was a phrase that was created by students when they could not identify what type of meat was being served in the lunch room. is it pork nooo chicken nah ... well mystery meat lol the truth .

It's like all the excess/ left over meat of the animal mixed together .So it could be like pork, Beef, hsm etc all in one

I agree with the long answer above

it is the meat that is served in the school cafeteria. i still don't know what that stuff was ...it's a mystery!

White Castle burgers

It's that dark-coloured lump that's been stuck to the back of your refrigerator since some time before Christmas 2006.

It is a type of meat that when you bite into it, you say "What meat is this?"

It's something served at places like McDonalds, Burgerking, KFC, etc.

Nobody really knows...