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1.
The evil brother of the roflcopter. Scientists who have studied both the roflcopter AND the lmaofish believe that the lmaofish would win in a fight.
Also a stronger term of the phrase "laugh out loud" than roflcopter, meaning that you are literally hurting from laughter.
"wow, your lmaofish jus pwned my roflcopter"
or
*tells joke*
"LMAOFISH"
by drunkenpanda September 04, 2008