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1.
Commonly used in aim, it is an alternative to lol. It is the meaning for laughing quietly by myself
Bob:why did the chicken cross the road?
Steve:To get to the other side!
Bob:lqbm
Steve:lqbm
by Alec Montgomery November 24, 2006
 
2.
Laughing quietly by my self. Rarely used online.
Webcam chat

Anna:The video that you uploaded is so funny LOL:)

John:LOL? more like laughing quietly by my self(LQBMS) you are barely laughing girl.
by VladAlucard23 April 09, 2008