1. nickname given to people acting silly, dorky, or roon-ish. 2. what you call a nerdy friend. 3. common nick name for a stray dog. 3. can be used as a noun or adjective and an adverb. 4. Unique's name for an animal turned into a sentimental nickname for her friends. 5. nick name for someone you are close to.
you can say "oh Roon" for a sentiment. Roonie roon! Expresses that one is excited about something.
by Paris-roonie September 26, 2007
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A woman whose comments often verge on nerdiness. Often no one else knows what she is talking about, but really she is the smartest person in the group.
Cameron: So speaking of sniper rifles...
Elizabeth: Oh Cameron, stop being a roon, we weren't talking about sniper rifles.
by Pam and Elizabeth July 17, 2006
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To get stoned or high as fuck. Or to act in a manor that some might describe as down syndrome or kilt.
All of the realboys got rooned after they smoked weed.
by RealBoyCoppock August 22, 2011
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An acronym or abbreviation for "Random Outburst of Noise"

Occurs when a person isn't sure how to express themself resulting in a ROON (Random Outburst of Noise).

Can be the result of many emotional states but is typically associated with impulse reactions and enhanced excitement.

NOT an explitive or profanity
Thinking about the dress she might wear tonight, she ROONed to herself as she sat at her desk.

Frustrated with his project, he gave out a ROON as began working again.
by mrcraigs February 7, 2012
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Majestic, leader of all that is great, tall, handsome, uncannily smart and funny with a confident glow. Has the cheek of all in the land yet powerful, sexy and in control with an easy going yet passionate array making him the best lover you've ever had. The Roon will suprise you with his vulnerable, frustrating yet mysterious nature making his power and prescense impossible not to love. Roon means: the ultimate physicaly, mentally, randomly genius . The man whore who you will always forgive,. Roon has the power of all the gods he is ...the GOD. All Love, No enemies. No War.
My boyfriend is The Roon; Oh man you are The Roon...
by Cameroon July 19, 2006
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Someone who spoils movie or tv shows on the regular.
"Did you see the new plot twist thriller movie?"
"Going to see it this Friday!"

"Omg here's how it ends!"

"YOU ROON!"
by Lululuvzu December 1, 2016
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