Acronyms dictionary MBN What does MBN mean? MBN is an acronym that means must be nice. It can be meant as a serious reminder to be polite or as a way of expressing dissatisfaction or envy. It's often used as a hashtag. Examples of MBN I don't ever hate except on people who have the luxery to travel often 😩😔 #mbn @KeenerYvonne, April, 2018 A relationship where y’all sooo into each other y’all don’t even be on yall phone unless y’all taking pictures😩 #Mbn @DaTTWaYY, April, 2018 How you sleep knowin financially you’ll never have to worry bout anything life #Mbn 😩 @Loyal_ToDa_Soil, April, 2018 SEE MORE EXAMPLES Who uses MBN? me.me imgflip Just Added shelfie, ACAB, yeet, Karen, BIPOC Note This is not meant to be a formal definition of MBN 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 MBN that will help our users expand their word mastery.