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3.
A scenario where you lol to your maximum lolage, pushing your loling capacity to the max.
In other words, laughing so much until you hurt or similar.
'OMG that was SUCH a lolathon!'

Anne and Dave had a right lolathon the other week over the current economy climate.
by CloserThanYaThinkBoss July 29, 2011
 
1.
persistent loling till one can lol no more
"That film was an absolute lolathon"
by breeeeeeee January 06, 2007
 
2.
lol-a-thon can be defined as a series of loling in sequence. A lol-a-thon may be an occurance with one participant or many, it really depends on how funny or lolable an event is :]. Also, a lol-a-thon usually goes for a while, as most "a-thon's" do.
"Oh, it was a lol-a-thon when Jerry stacked it over the railings yesterday LOLOLOLOLOL XD"
by LAWLmonster October 06, 2007