1. a situation that is not clearly defined or where the rules are uncertain
it's a bit of a grey area
This phrase expresses a situation that is not clearly defined or falls between different categories. A 'grey area' is open to interpretation as generally the rules are not known and therefore it is hard to judge what is right or wrong. This can lead to confusion about how to deal with a situation or decide who is responsible for it, but it can also lead to opportunities if you take appropriate advantage of the confusion. It can be used in a social context but is more common in a professional one. A phrase with a similar meaning is 'no-man's-land.'