Top definition
(n.)
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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