i was looking for a pic for "batshit" when i came across this:
Insane:
The word "insane" comes from the Latin 'in sano' meaning, 'You are a complete fucktard for having a different opinion to mine!'
Insanity comes in a few different levels, as broken down by expert e-psychiatrists
found here:
http://www.encyclopediadramatica.com/index.php/Insane