A combination of L.M.A.O. = Laugh my ass off
And 0wned
if this was put into "english" so to speak, it would be "hahaha you got 0wned"
or "hahahahaa your'e so stupid"
Guy 1: my msn just bust upon me, AND i fell off my chair
Guy 2: Lma0wned!!
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi