When a co-worker leaves for the day early, and you have to remain at work for a more significant amount of time. Usually accompanied by that person also getting to work later than you did.
Peter: (after strolling in at 10am that morning) "Hi team, I'll be leaving at around 3pm today."
Bob: "*looks at watch* (mutters "MBN" to teammates)
by The Fake Grabowski March 21, 2018
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Jackronym 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."
by justsanotherdude December 02, 2013
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Stands for must be nice usually used when couples post pictures on social media.
Clearance and Queen relationship mbn.
by TheKiddo23 May 30, 2018
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“Girl I just got a new man.” “Mbn”
by kittykittypaws October 15, 2019
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Must be nice - a short term to say must be nice it MBN it means well that must be good for you
MBN to have a dog
Must be nice to have a dog
by Idfwy.bri February 21, 2021
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