Bender is the wisecracking robot from Futurama, the animated science-fiction sitcom created by Matt Groening that first aired in 1999. Bite my shiny metal ass became one of his signature insults, repeated across the series whenever he wanted to shut down an argument with rude confidence. As Futurama clips spread through soundboards and meme pages, the short line took on a second life as a reaction sound, and it still works because it is instantly tied to Bender's personality.