GLaDOS is the deadpan artificial intelligence antagonist of Valve's Portal, released in 2007, and Portal 2 in 2011, voiced by Ellen McLain. Her polite but menacing delivery became one of gaming's most quoted voices. L bozo is newer internet slang, where L stands for a loss and bozo mocks the person who took it. Online editors combine the two, putting the put-down in GLaDOS's voice for streams, shorts and gaming edits, where it works as a fast, recognisable way to laugh at a mistake.