If you could provide more context or the source where you saw this term, it might be easier to understand what you're referring to and provide a more accurate explanation.
Here are some related terms that might be what you're looking for:
* Diglossia: This refers to a situation where two distinct varieties of a language are used in different social settings. One variety is typically considered "high" or formal, while the other is "low" or informal.
* Code-switching: This describes the phenomenon of switching between two languages or language varieties within a single conversation.
* Style shifting: This refers to the adjustments speakers make to their language based on the social context, such as formality or intimacy.
Please provide more information so I can help you better.