Lazinessitis Share definition Flag A common mental health issue that makes a person very lazy. It is sometimes contagious and could be permanent. Becky I don’t want to go to school. I think I might have lazinessitis. Lazinessitis by Yickatee September 8, 2018 0 0 Get merch Get the Lazinessitis mug. Buy Now — $32.95 See more merch