Ever come across something and thought "This guys got way to much free time"? Sure you have!
Ocio is the word you need to able to express that thought in Spanish.
Ocio means leisure or free time. A person who is an ocioso (or ociosa) has a lot of free time on their hands.
So I think we can translate "Eres un ocioso" safely as "you have too much free time".
And when you see something that was clearly done by an "ocioso", you can say:
Una persona con mucho ocio hizo eso.
Somebody with too much free time did that.
Hmm, the more I think about it, it's quite possible that the author of this blog is an ocioso...