A mangled heap of something that has fallen from the back of a vehicle onto the road.
That mattress is going to be loadkill in about ten seconds if you don't tie it down.
n. What happens when large, real titties are forced upwards by excessive amounts of structural support to produce a shelf-like cleavage useful for storing cellphones and dollar bills, and for holding food.
If I had shelf rack right now, I could totally keep a tv dinner there.