They are implying that they have "killed" you - you are in big trouble with them, and they are going to make you pay for whatever you just did to them.
It is actually an idiom.
The opening line of the book, "Old Marley was dead as a doornail." Dead as a doornail is an idiom.
Dead to the world means sleeping soundly. One example of a sentence with the idiom dead to the word is: After working a double shift, Sarah fell asleep and was dead to the world.
In one word: dead.
middling meat
The meaning of the idiom dead certainty is absolutely or definitely
The idiom is "dead certainty". It means it's in the bag = this is a dead certainty = this is cinch
Dead Meat was created in 2004-10.
The duration of Dead Meat is 1.33 hours.
I wouldn't be caught dead in sleeping during the class.
I think the correct idiom is "you are more than a piece of meat," which means that besides your physical attributes (like beauty or physical attractiveness), you also have mental, emotional, or spiritual characteristics that are attractive.