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)
Bob: "*looks at watch* (mutters "MBN" to teammates)
by The Fake Grabowski March 30, 2018
Get the MBNmug. 
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."
Girl B: "Hot is right. I have always dreamt of being the centerpiece in an MBN circle twerk."
by justsanotherdude December 2, 2013
Get the MBNmug. 
