noun

• A surname from Min Dong.
• (US) Initialism of National Governors Association.
• (military, US) Initialism of National Geospatial-Intelligence Agency.
• (UK, historical) Initialism of National Graphical Association.
• (African-American Vernacular, Internet slang, text messaging) Abbreviation of nigga. [(vulgar, slang, often offensive, but also often used affectionately in African-American Vernacular) A close and loyal friend.]