Sicko, Whacko, Weirdo

The -o suffix traces back to old comic strip characters with names like Knocko and Groucho. Neato! Slate Plus members get a bonus segment on Lexicon Valley each week, and no ads. Sign up now to listen and support our show. Twitter: @lexiconvalley Facebook: facebook.com/LexiconValley Email: lexiconvalley@slate.com Learn more about your ad choices. Visit megaphone.fm/adchoices