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is undefined 

the description of a word that has not been defined in the by urban dictionary viewers.
is undefined by James T. Carson April 22, 2006

Undefined 

See the above definition for undefined.
Undefined by Mr. Bodkin Newberry August 22, 2007

Undefined 

Ugh this math is frustrating! ITS SO UNDEFINED!!
Undefined by InS4nity HD October 13, 2016

undefined social life 

1. The idea of having a social life does not exist in the person's mind. Where the idea of having friends, the concern of not having friends and dating is inconceivable and is of not existence. The reason being is that person has never been predisposed to it in the first place, so the idea of not having friends does not bother him or her. In other words, take for example the Sims computer game. It's like having a sim that has no social bar on the needs indicator. By having an undefined social life, the person does not have to worry about maintaining friendships, giving gifts, working out relationships,losing, nor betraying friends. Because the person who has and undefined social life has nothing to lose. It's like dividing a number by zero when it comes to determining the number of friends an undefined social life person has.
John has never had friends; he does everything by himself. He must have an undefined social life because he is always happy doing things by himself. Whenever someone asks John if he has ever had a girlfriend, he just looks at them weird at complete and utter confusion.
undefined social life by AJHM June 5, 2007

undefined 

A word in the urbandictionary that is lacking definition.
This word was previously undefined.
undefined by Denis Baldwin June 3, 2004

undefined behavior

Undefined behavior results when programs attempt to do things for which the standard defines no semantics, and requires no diagnostic either. Examples include dereferencing invalid pointers and dividing by zero. Executing such programs may cause them to produce incorrect results, crash, silently "work", or even format the hard drive.
It is commonly joked that undefined behavior allows the compiler to insert code that will start a game of nethack.
undefined behavior by henke37 May 23, 2014
More from Urban Dictionary

funflation 

The recent boom in consumer spending on entertainment and experiences with a high demand running up the cost of enjoying of those experiences.
I’m trying to go to this Taylor Swift concert but the funflation has made it so impossible for me to afford tickets.
funflation by Dfree523 November 17, 2023
Word of the Day on October 13, 2026
A US deep south term for an alligator. Usually used in the Cajun dialect.
Take the big pirogue, I saw a huge swamp dog out there earlier.
swamp dog by Crystal Ambrose May 22, 2006
Word of the Day on October 12, 2026

Throat Sweats 

The feeling and build up in your mouth/throat of saliva that sometimes accompanies nausea.
Oh man those burritos gave me the throat sweats, I hope I don’t have food poisoning.
Throat Sweats by TacoFings420 April 23, 2024
Word of the Day on October 11, 2026
Being ignored by someone when making a statement or asking a question. Also known as blanked and turfed.
Person 1: Did u watch ** last nite?
Person 2:......
Person 3: O no u got aired!
aired by Pietro February 9, 2005
Word of the Day on October 10, 2026

piddlefart

verb. To waste time doing nothing.
Instead of doing my homework, I decided to piddlefart around for two hours.
piddlefart by Rene April 25, 2005
Word of the Day on October 9, 2026
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026
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