Grey areas are areas that are nebulous and uncertain, where we can't see clearly what's happening. Fog is grey, Rain clouds are grey.
Grey in politicsEdit
In politics the grey vote is the vote of older people, supposedly with grey hair. Politicians are warned to pay attention to the grey vote because older people are more likely to go out and vote than youngsters.
Young Internet users, you don't like it that your representatives pay attention to the grey vote. You know what you can do. Go out and vote.