Stupinfectious Share definition Flag A level of stupidity so bad that it is HIGHLY contagious. The most dangerous pandemic of modern times. Dave is so stupinfectious, i talked to him for five minutes & i think my IQ dropped 50 points. Stupinfectious by whomeididntdoit April 29, 2010 0 0 Get merch Get the Stupinfectious mug. Buy Now — $32.95 See more merch