Core, maybe? I'd have a hard time giving a name to that one. I generally call 'em 'chunkers' and leave it at that. Keep 'em coming - and happy hunting. Yak
Chunker works for me too.
It may be a core ..or just a piece that was flaked a few times then discarded.
I don't see an intentionally made tool there.
actually.. with the sharp contrast in patina where the chips are it looks like it wasn't very long ago that they happened.