Wordnet 3.0
NOUN (1)
1. 
 informal language consisting of words and expressions that are not considered appropriate for formal occasions; 
 often vituperative or vulgar; 
- Example: "their speech was full of slang expressions"[syn: slang, slang expression, slang term]
WordNet (r) 3.0 (2006):
slang expression
    n 1: 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" [syn: slang, slang expression, slang
         term]