Several of the words and phrases invented for the show soon entered common usage, the most famous being the word . In the episode "Lurgi Strikes Britain", Spike Milligan introduced the fictional malady of Lurgi (sometimes spelled Lurgy), which has survived into modern usage to mean the common cold, or any miscellaneous or non-specific illness (often preceded by the adjective "dreaded"). The symptoms of Lurgi included the uncontrollable urge to cry "Eeeeyack-a-boo", though even during the episode the ailment proved to be an extortionate attempt to sell brass band musical instruments. Milligan was later to make up his own definition in "Treasure Island According to Spike Milligan", where Jim Hawkins' mother describes it as "like brown spots of shit on the liver".