Wikipedia says that the term “steampunk” was coined in the 1980s and is “a subgenre of science fiction and sometimes fantasy that incorporates technology and aesthetic designs inspired by 19th-century industrial steam-powered machinery.”
So I guess I watched steampunk cartoons in the 1960s: The Lone Ranger! Yeah, you young whippersnappers, I did steampunk before it was even called steampunk! Here’s a couple of goodies: The Iron Giant and The Human Dynamo. The music and the clomping feet of that giant still sound cool.