Comes from the Soulja Boy song "Bootymeat". Just substitute "idiot" for "booty".
Morgan: "Just want to let you know: I've self-diagnosed myself with HAJ. Unfortunately, there's no cure, so it's just going to be something we have to keep dealing with. Please support me in this time of personal distress."
Jessica: "HAJ? Hilarious Apple Jalapeno?"
Morgan: "No. Hyperactivity Around Jessica."
Jessica: "You are USDA-approved, Grade A idiotmeat."