Definitions by StapleNibo

msb 

A Acronym derived on the MMORPG "Runescape" First used by a player known as Staple,or "Nibo." It means (M)ad (S)ad (B)ad as a flame toward raging players that are considered "Bad" at the game.

l0l why you so msb bro?!

msb by StapleNibo April 24, 2011