1. stands for "must be nice" and used sarcastically
when someone tells you something that makes them sounds wealthy, carefree, or conceited.
Wealthy Chick: My parents, my sister and I are going to Aruba for Christmas for a week then to Argentina and Brazil to spend the New Year.
Poorer Friend: MBN! shit!!!
Wealthy Chick: What does 'mbn" mean?
Poorer Friend: it means that it Must Be Nice, mutherfucka! Tell your parents to hook ME up!
must be nice..........
GuyA: Damn I'm full, huge steak dinner.
GuyB: I'm eating chicken Ramen, mbn.
Jackronyn for MasturBation Nation - A group of outstanding (self proclaimed) men, linked by messaging technology to share in inappropriate comments, sarcasm, and random shenanigans.
Girl A: "Look at that group of extremely hot guys texting inappropriate, sarcastic, highly intellectual messages."
Girl B: "Hot is right. I have always dreamt of being the centerpiece in an MBN circle twerk."
Acronym for MUST BE NICE. Usually used on Facebook when someone posts pictures of a fancy car or house.
Brian: Check out my $68,000 Honda