The definition of alt-right in the essay "Dark Jesters Hiding in Plain Sight: Hoaxes, Hacks, Pranks, and Polymorphic Simulations" by David Garcia is... interesting.

"an unholy alliance connecting 'teenage gamers, pseudonymous swastika-posting anime lovers, ironic South Park conservatives, anti-feminist pranksters, nerdish harassers and meme-making trolls whose dark humour and love of transgression for its own sake' have been hijacked by actual white-segregationist neo-Naxis, who used the mischievous culture of lulz as cover to propel their ambitious political program all the way to the White House."

Hard to think of it just as a "culture of lulz" when it's so much more complicated.