A Big Hairy Audacious Goal is a statement which is created to focus on a goal which is audacious.
The term 'Big Hairy Audacious Goal' (BHAG) was proposed by James Collins and Jerry Porras in their 1994 book entitled Built to Last: Successful Habits of Visionary Companies. Collins and Porras define a BHAG (pronounced BEE-hag) as "...an audacious goal to progress towards an envisioned future." "A true BHAG is clear and compelling, with a clear finish line, so you know when it is achieved; people like to shoot for finish lines."
—Collins and Porras, Built to Last: Successful Habits of Visionary Companies. (Wikipedia info)