Top Definition
A combination of the word 'hilarious', and the honorary word 'lol' extended to 'lool'
(pronounced hill-loo-lee-us)
*small child falls over*
Person: That was hiloolious... absolutely hiloolious

Person 1: Hey did you see that documentary on AIDS last night?
Person 2: Why yes, I thought it was hiloolious!
Persons 1 and 2: Hahahahahaha...
by Library Pirates March 19, 2010

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