Here are some possible interpretations:
* "Concerning" with a typo: If this is a typo, the intended phrase would be "concerning", which means "causing worry or anxiety" or "relating to".
* Slang/informal usage: In some informal contexts, "dis" could be used as a shortened form of "this" or "that", but this usage is not widely accepted in formal writing.
If you provide more context, I can give you a more accurate interpretation. For example, what was the sentence that included "dis concerning"?