Do you have the moxie to learn a little 20s gangster slang? They were called the Roaring 20s because the Jazz Age was a fast time when juice joints were filled with molls and gold diggers in glad rags. So quit lollygagging and get started talking like a 20s gangster. Whether you're planning a flapper party, want to get more out of old gangster movies, or are just up for a laugh, 1920s slang will make you the niftiest sheik or sheba at the speakeasy.