Citsitua Caduceus
Someone who is on the autistic spectrum and knows a lot of information about specific topics. They tend to prefer face to face interactions over text because they come across differently than they do in person. Examples of this include giving unwanted opinions to strangers online/twitter regarding science or medical care. Doesn't take kindly to being made fun of or being messed with. Has nothing nothing better to do than make this urban dictionary definition.
Citsitua Caduceus jokingly(of course) wanted to say fuck you