McAvoysomnia Share definition Flag A condition in which one forgoes sleep to spend all night looking at pictures and/or videos of James McAvoy on the internet. Dude, face it: you've got McAvoysomnia! McAvoysomnia by coattails July 26, 2011 0 0 Get merch Get the McAvoysomnia mug. Buy Now — $32.95 See more merch