British slang refers to informal language and expressions commonly used in the United Kingdom. It often varies by region, with different areas having their own unique terms and phrases. For example, in London, you might hear "gobsmacked" to describe being shocked, while in Liverpool, "boss" can mean excellent or great. Slang can also reflect cultural influences, such as music and youth trends. Terms like "chuffed" (pleased) and "knackered" (exhausted) are widely recognized. Understanding British slang can enhance communication and provide insight into the local culture, making it an interesting aspect of the English language.