boney pile 

a.k.a. "Slag heap." A boney pile is a mound of coal waste, sometimes the size of a large hill and indistinguishable from rolling hills around it. "Boney" is the waste itself, also known as "slag."

"They've reduced the boney pile in Revloc and now you can see the town from the highway."

boney pile by Edenza February 27, 2008

Pile of bones 

A pile of skeleton parts.

Let's go climb that pile of bones!

Pile of bones by ('; February 3, 2021

whipping a pile of horse bones 

The phrase "whipping a dead horse" means to attempt to revive a moot point or issue. "Whipping a pile of horse bones" means to keep making futile and pointless attempts to revive interest in something that no one has cared about for so long its rotted away into a skeleton of its former self.

AKA: The Simpsons

Seasons 1 through 6 were the best. By season 8, FOX and Matt Groening were whipping a dead horse. Which means for the last 10 seasons they have been whipping a pile of horse bones.

whipping a pile of horse bones by weasel1969 October 9, 2008