slang in WordNet English dictionary

1. a characteristic language of a particular group (as among thieves)
   "they don't speak our lingo"
   slang  cant  jargon  lingo  argot  patois  vernacular 
   
2. 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"
   slang  slang expression  slang term 
   

1. fool or hoax
   "The immigrant was duped because he trusted everyone"; "You can't fool me!"
   gull  dupe  slang  befool  cod  fool  put on  take in  put one over  put one across 
   
2. abuse with coarse language
   slang 
   
3. use slang or vulgar language
   slang