Real Dictionary

nimby
If you say that someone has a nimby attitude, you are criticizing them because they do not want something such as a new road, housing estate, or prison built near to where they live. Nimby is an abbreviation for 'not in my backyard'.

NIMBY in American English
opposition by nearby residents to a proposed building project, esp. a public one, as being hazardous, unsightly, etc.
abbreviation: not in my backyard: used to express opposition by local citizens to the locating in their neighborhood of a civic project, as a jail, garbage dump, or drug rehabilitation center, that, though needed by the larger community, is considered unsightly, danger

NIMBY in British English
noun acronym for: not in my back yard: a person who objects to the occurrence of something if it will affect him or her or take place in his or her locality