This word was first formed by a vtuber known as AsherNebulusVT on twitch.tv/AsherNebulusVT, was mentioned in a game of Dead By Daylight, a 4v1 horror game
AsherNebulus: this, this,….DUMBASSERY! Yes, the dumbassery I have committed
A word for quite literally the most idiotic, bitchass motherfuckers you'll ever meet, oftenly used as a insult towards autistic people, well, atleast to me.