An online game that lags like fuck, usually due to some idiot attempting to run the game on some piece of shit mac or windows 95.
Simple as that.
I was in a lagfest yesterday, every game second that passed took 5 real seconds, for fucks sake, was that idiot's processor ran by hampster wheels?

by TACTICALSQUAD July 30, 2008
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when you play an online game with slow internet
a huge lagfest went on for 20 minnutes because of the bad weather.
by nobody else here March 10, 2017
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An online game that lags constantly so that its not possible to move or do anything in game
I was on a MW2 server yesterday and it was like a fucking lagfest!!
by Your Penis112 September 2, 2010
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