NIMBY PART OF is an acronym for 'Not In My Back Yard, ' which is a phrase used to describe people who oppose the development of something in their local area, even if they may support it in general. It is often used to refer to people who oppose the construction of large projects such as power plants, highways, and prisons. NIMBY PART OF is a term that has been used since the 1980s to describe those who are opposed to certain developments in their local area.