what ARE goblins?

What are Goblins? What are Goblins? I don't know.... But to me they will always have horns. Most Orcs and Goblins these days seem to lack them but in my mind the idea of them both having horns is pretty much hard-wired directly into my brain. I grew up on the Rankin Bass Hobbit and Ralph Bakshi's adaptation of the Lord of the Rings and they both shaped my idea of Orcs and Goblins as horned green people. (There was of course Heroes of Might and Magic III, The Hobbit graphic novel adaptation, the Peter Jackson films and a tiny snipped of Morrowind that shaped my views as well) They are still one of my favourite races in Fantasy, I freaking love them.