A kind of language occurring chiefly in casual and playful speech, made up typically of short-lived coinages and figures of speech that are deliberately used in place of standard terms for added raciness, humor, irreverence, or other effect. Language peculiar to a group; argot or jargon: thieves' slang. To use slang. To use angry and abusive language: persuaded the parties to quit slanging and come to the bargaining table. To attack with abusive language; vituperate.