slang

noun
  1. A type of informal language that consists of words and phrases that are regarded as very informal and are often specific to a particular context or group of people. noun
    Teenagers often use slang that adults may not understand.
    The book was written in a style that included a lot of contemporary slang.
  2. To use slang or informal language. verb
    He tends to slang a lot when he's with his friends.
    She slanged her way through the conversation, making it hard for outsiders to follow.