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Random Black Man; usually found in parties around college campuses. Can often be found dancing shirtless near the stereo after only a few drinks. Nobody at the party knows this man, making his blackish presence random.
Partier 1: Dude, who's that shirtless nig dancing near the stereo?

Partier 2: I don't know, looks likes an RBM to me.

Partier 1: Quick, hide the Hennessey!
RBM by APeezy716 December 17, 2008
Related Words
rbm RBMF RBMD rbmg RBMK
Stands for Rust Belt Mother Fucker. A phrase used when talking about people from Ohio, most notably students from The Ohio State University. These slapdicks refuse to recognize the inferiority of the Big Ten (wait I count 11?), and act surprised when teams from the south make their Buckeyes look mediocre and slow. RBMF’s fail to comprehend how defensive linemen in the SEC are faster then everyone on their team. RBMF's are scared to death of having a conference championship game.

Sociologically, RBMF's are bitter that their moms lost their jobs when the factories shut down, that their dads' farms were foreclosed and repossessed, and that all that remains of their childhood is a rusted tractor body (the wheels were burned to provide heat during harsh winter).
RBMF: I've got my soda pop and beer and I'm headed to the Shoe! We're going to win!

College football fan from the South: You probably will beat Northwestern today. Congrats. What happend when Texas came to the Shoe?

RBMF: Who cares?!?! We're going to dot the I today!!

College football fan from the South: RBMF.
RBMF by Richtoria's Secret March 19, 2007
RBMG: Red & Black Music Group. A Independent Multi Talented Record Label. Based Out Of Hyannis, Ma. It Has Roots In Jacksonville, Fl. Male & Female Artists, Exclusive Producer BIG RIZZ & CEO Of RBMG: Nicholas “Three” Snowden
You heard that new song “ANDALE” by RBMG? Go listen!!!
rbmg by USRecordLabels November 8, 2018
Dat f*ck nugget came at me like a retard with a rbmd.
RBMD by GimpyButtNugget June 15, 2012
The reactor used in the Chernobyl nuclear disaster, had an issue where due to the control rod design it liked to blow up.
Dyatlov: do the test!
Akimov: no, not safe
Dyatlov: I dont care, do it
Akimov: ok
*emergency shutoff/scram button is pushed*
The RBMK now has a hole in it.
RBMK by CANDU-6 April 14, 2021