The one and only. A person who owns everything and everyone in all situations due to his destructive, dominant, and often sadistic mind. He feels no pain, and few emotions. He is invincible, and he is the Requiem for any who resist him.

An elite form of Sociopath, without the disociative aspect.
Person A: He's so sadisctic, i think he's a sociopath.

Person B: No, worse, he is Udie.
by Blue Scorpion December 3, 2006
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A very small ethnic group found in the Caucasus Mountains of Russia. Their language is (disputedly) related to Lezgin, which in turn is spoken in Azerbaijan and Daghestan. The Udi used to have two main ethnic centers in Azerbaijan: Vartashen and Nij. Azerbaijani nationalism has forced the Udi to settle in Armenia and Georgia, in scattered communities. They are a Christian people whose church is very similar to that of the Armenians. There is a movement by some Udi to form an organization "Aghvank" in Armenia, to preserve the endangered language of the Udi and their customs for future generations.
I'd like to learn more about the Udi people---their language seems to be very interesting.
by pentozali September 28, 2007
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UDI'S are basically referred to as Unidentified Drinking Injuries. These occur when you are drinking of course. New injuries from drinking aren't noticed till after you are sober, you can not for the life of you remember how you received said injury, but it's obviously due to too much alcohol consumption from the night previous. When drinking you easily obtain bruises as well, so if you were drinking last night and you wake up with hella new bruises, you know why.
Friend one: "Damn dude! I woke up this morning with a fuckin' golf ball sized bruise on my thigh, what happened?!"

Friend two: "How many other UDI's did you get from last night??? I think I saw you get that one, you knocked right into a table!"

Hungover friend one: "I have nine new bruises from last night..."

Hungover friend two: "UDI's?"

Hungover friend one: "fuck, yup."
by WishyFish May 4, 2009
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A U-Turn (pronounced you-dee)
I missed the house so I made a udy.
by rockntubakid December 26, 2009
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One who is silent and looks menacing until they smile.
Man, that guy over there is such an Udi. he looked like he wanted to kill me, but instead he told me a joke. Phew.
by pezwondergirl February 15, 2011
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The Udy Maneuver is a post-modern term that indicates a man has placed a tube sock over his erect penis during masturbation, typically used to corral ejaculate.
My buddy at work introduced me to the Udy Maneuver. Opened my eyes to a whole new world of masturbation!
by xXCbarVXx October 1, 2020
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1. An Indian nickname given to a child who is anti-social others may view them as depressed. (language: Punjabi)

2. Short form for Udayveer
Man that Udy gives me the chills he's creepy
Mr. Jhonny calls Udayveer Udy
by Gigguk October 17, 2018
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