Top definition
An emotional roller coaster involving many lolz. Usually a recurring joke. A lolcoaster can last anytime from one hour to a lifetime.
You: Hey Jimmy, remember Mrs. Johnston in Science class last year? She was such a fatty. And an annoying lolcow

Jimmy: OMG yes, I was on a lolcoaster the whole time. Lawls.
by lolhannah May 16, 2010
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