VTD:Visually transmitted disease. Getting a mental illness or disease from watching negative, nasty, violent, or addictive images.
VTD: or visually transmitted disease is a disease that you "catch" by seeing images which results in maladaptive behaviors. for example watching pornography results in an addiction to pornography or a visually transmitted disease.
Maaann... that chick gave me a VTD and I haven't been right in the head since!