flesh pile
1. When two or more massive biological entities fornicate all over each other.
2. When one of said biological entities fornicates all over an organism that is lesser in size.
3. When some of said biological entities perish while fornicating, and the rest of the entities continue fornicating on, into, inside, through, and around said perished entities.
"Flesh pile" doesn't really need further explanation. Just use your imagination, and you WILL have nightmares for the next few months, guaranteed.