What is the defersion of expression?

The term "defersion of expression" appears to be a misspelling or a misunderstanding of "diversion of expression." If that is the case, it typically refers to the act of redirecting or altering the way thoughts or feelings are communicated. This can involve using different Words, tones, or gestures to convey a message in a way that may be more acceptable or effective in a given context. If you meant something else, please clarify for more accurate information.