Top Definition
That one kid you know that you can't be serious with or you can be the biggest comedian hanging out with him because he just laughs at anything/anyone/anywhere/ every time.
Me: "Yeah I'm going through some tough times, my parents are getting divorced."
Sir Laughs A Lot: "Hahahahahahahaahahahahahahaahahah!"

Me: "Knock-Knock"
Sir Laughs A Lot: "Hahahahahahahahahahahahahaahahahah!"
by AnthOhKnee July 16, 2011

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