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Heisenbug 

A term in software programming used to describe a coding problem (or "bug") that seems to defy testing by presenting itself exclusively in published, released or demonstrated code, but not at any point during debugging. It disappears or alters its characteristics when an attempt is made to study it.

The bug both exists and doesn't exist and simultaneous points in time -- the reference is to Heisenberg's Uncertainty Principle (or to be direct, the quantum cat in the Heisenberg scenario).
Ben: Hey! After three weeks, I finally finished that interface you asked for. Here, try it out.

Mike: Great! I'll just click on the "Save" button... Hey, the browser crashed!

Ben: What? Let me look at it... All my debug information looks fine... I'm not getting any errors at all!

Mike: It's all fucked up! Look! It doesn't even work! What are you trying to do to me?

Ben: B..but I just ran it on my own server and it works fine! Look, I'm not even getting any errors from your Save! It can't be a bug!

Mike: IT'S FUCKING BROKEN! You've disappointed me for the last time! YOU'RE FIRED!

Ben: CURSE YOU, HEISENBUG!!!
Heisenbug by saurin37 April 16, 2009
Urban Dictionary Merch

Heisenberg 

The alter ego to the character Walter White in the beloved Breaking Bad tv show. The term Heisenberg was originally used by Walter as a way of concealing his identy so no one know that he was Heisenberg, but soon the name Heisenberg became a legend in it of itself as the characters Crystal Methampetamine (referred to as blue sky occasionaly because of its blue color) and perhaps the world’s highest chemical purity (generally ranging in the late 90%) and by the end of the show (Spoilers) Heisenberg is often used to mock Walter due to the complete and utter collapse of his drug empire.
“Say my name.”
“Heisenberg.”
“You’re Goddamn Right.”
Heisenberg by magickiwi56 September 30, 2018

pull a Heisenberg 

When you decide to manufacture methamphetamine due to the way your crappy life is headed.
Jeremy thought he would pull a Heisenberg.
pull a Heisenberg by hhhhhhfhgg December 23, 2012

Heisenberged

The act of being utterly dominated; either verbally, physically, or intellectually by Bryan Cranston aka. Walter White aka. Heisenberg.
Holy shit......Gus actually got Heisenberged for once. That Walter White is mean.

To Heisenberg 

The act of growing a pair & wrecklessly entering dangerous situations.
Made popular by the show Breaking Bad where Walter White starts to become more of a badass as he delves further into crime & the drugs market.
Example of To Heisenberg include
Telling a 6'5 giant bald guy who would rip your face off to ''stay off my territory''
Blow up a building with your awesome chemistry skills
Do a long con on a major drug-lord
Set a car on fire whilst the owners back is turned
Run over drug dealers & shooting them in the head if they survive

Heisenbird 

Police were thrilled about the arrest of notorious criminal known under the alias of "Heisenbird" Evidence consisting of feathers and large amounts of crystal meth were found in his nest in Albuquerque, New Mexico.
Heisenbird by Heisenbird14 October 5, 2016

Heisendumped 

Closely related to the word Heisendate.

The effect created between two people who were dating when one issues the terms of "needing some space" or "being on a break" or "needing time to sort things out".


The word is a combination of Heisenberg, the scientist famous for his Uncertainty Principle, and the word dumped.
Well, I might be single. I had a boyfriend but the other night he Heisendumped me.
Heisendumped by Kitten March 17, 2005
More from Urban Dictionary

You met me at a very Chinese time in my life

A moment in time where you feel distinctly Chinese over all other things.
Dante: "I wish I could be Nigerian, but I can't because I'm Chinese. You met me at a very Chinese time in my life."
Word of the Day on September 25, 2026
Adjective. Used to describe persons who have adjusted or altered their lifestyle for environmental reasons. Crunchy persons tend to be politically strongly left-leaning and may be additionally but not exclusively categorized as vegetarians, vegans, eco-tarians, conservationists, environmentalists, neo-hippies, tree huggers, nature enthusiasts, etc.

Also used to describe establishments where alternative foods and products are sold, i.e. natural food stores.

Modified derivative of granola.
"I need more crunchy guys in my life. I'm so tired of dating preppy metrosexual assholes."

"I'm heading out to the crunchy store to pick up some fair trade chocolate and tea tree oil, do you need anything?"
crunchy by EBC July 11, 2007
Word of the Day on September 24, 2026
A group of people, typically women, searching through someone’s digital footprint in order to find more information about that person.
Susie wasn’t sure if her new Hinge match was a creep, so she assembled Galantir and they found out he used to post slurs on gaming forums.
Galantir by Ge-sus September 22, 2026
Word of the Day on September 23, 2026

murderhobo 

In a tabletop game, a murderhobo is a player who murders NPCs indiscriminately. This is normally derogatory, referring to a player who totally ignores quests, dialog, backstory, trade, world building etc.

The term is most common with Dungeons and Dragons, but it can be applied to most RPGs where the player is allowed to kill most quest-giving NPCs and NPC traders. E.g. Elder Scrolls, Fallout, Divinity original sin.
DM: The sad little orphan girl tugs at Steve's trenchcoat to get his attention, and ask for help saving her pet dog from...
Steve: I'd like to roll a strength check against strangling the orphan.
Dave: I call dibs on the dog.
DM: You murderhobos disgust me.
murderhobo by Loup&S September 9, 2021
Word of the Day on September 22, 2026
In sales terms, a whale is a prospect that is significantly larger than an organization’s average customer.

Whales are large and extremely difficult to close. Due to their immense size, they are highly sought-after.

A whale is typically identified at first by a whale hunter on the sales team, but often requires cross-discipline participation in order to close; this includes assistance from operations, engineering, creative, client success, and business development teams.
"Shit...the sales director chewed me out on the sales call this morning. He's totally pissed that I have nothing in my pipeline. I've been focused on this one whale for so long that I haven't had time to prospect for normal-sized deals."
Whale by FQ_GFY February 3, 2020
Word of the Day on September 21, 2026

Concrete cowboy 

A guy who thinks he's a country kinda guy, but in reality lives a comfortable city / suburban life.
Eugene: Look at that dude in the cowboy hat!
Todd: He's just a concrete cowboy.
Word of the Day on September 20, 2026
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