Meat Packet
Someone who is born completely disabled, mentally, and has no potential to develop. Can also refer to someone who is beyond lazy and lifeless.
Babies deceasing in the womb are likely to become Meat Packets, sequentially.
Informally:
Bill: "This mother fucker lived his entire existence in his room...what a meat packet."
Informally:
Bill: "This mother fucker lived his entire existence in his room...what a meat packet."