1. (noun)slang, slang expression, slang term informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar "their speech was full of slang expressions"
2. (verb)slang, cant, jargon, lingo, argot, patois, vernacular a characteristiclanguage of a particulargroup (as among thieves) "they don't speak our lingo"
4. (verb)gull, dupe, slang, befool, cod, fool, put on, take in, put one over, put one across fool or hoax "The immigrant was duped because he trusted everyone"; "You can't fool me!"
2. (noun)Slang a fetter worn on the leg by a convict
3. (noun)Slang low, vulgar, unauthorized language; a popular but unauthorized word, phrase, or mode of expression; also, the jargon of some particularcalling or class in society; low popular cant; as, the slang of the theater, of college, of sailors, etc
Definition of Slang 
