To be a "Don Green" (DG) means you are a sad, miserable fuck who only looks at things negatively. These people are in danger of their faces cracking if they even attempt to smile. They continuously look sad, angry and unhappy.

Is also used to describe a fucked up situation or day.

Don Green people are the saddest of sad, miserable people whose existence is a waste of space to the rest of society.
Such a Don Green

What a Don Green day
by chasing cars October 30, 2016
Get the Don Green mug.