Acronyms dictionary GNO What does GNO mean? GNO is an acronym that means girls’ night out. It’s occasionally used to mean guys’ night out. Examples of GNO Yes, you need a GNO. And apparently, I need a GNO! Amy Robles, ThinkEnriched.com, April, 2014 GNO, also known as “Girls’ Night Out.” Until a couple of years ago, I had no clue that this was a “thing” and something I needed desperately too. Emily, MemphisMomsBlog, November, 2016 Shannon Montsinger, who is a singer/songwriter in Richmond, just released her latest single and music video, “Girls Night Out (GNO).” Jessi Coble, Richmond-Times Dispatch, November, 2013 SEE MORE EXAMPLES Just Added trigger law, bystander effect, CSI effect, Streisand effect, L + ratio Note This is not meant to be a formal definition of GNO like most terms we define on Dictionary.com, but is rather an informal word summary that hopefully touches upon the key aspects of the meaning and usage of GNO that will help our users expand their word mastery.