Top Definition
A multipurpose term (adjective or noun) generally used to describe something positive or outlandish.

Origin: Coined by The House of Capricorn and associates on a roadtrip down New Zealand in 2006 through the replacing of the prefix of bilau to create it's antonym.

Pronunciation: ree-lau
"Fuck, my night was rilau"
"Bro, how rilau was that chick?!!"
by Gris Grimly December 28, 2007

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