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killer app 

"An application that proves the usefulness of the underlying technologies"

Defined by Jawed Karem in the speech "YouTube: From Concept to Hyper-growth" held at University of Illinois at Urbana-Champaign ACM Conference, Oct 21, 2006. (www.youtube.com/watch?v=nssfmTo7SZg)
A typical killer application:
- the first spreadsheet application

Killer apps in the internet domain:
- Wikipedia
- LiveJournal
- MySpace
- Flickr
- YouTube
killer app by Papy Jojo December 15, 2008

Killer App 

When at the click of a link sent via an app, someone’s digital device is virally infected or disabled, often with the terrorist sender or hacker able to retrieve the data stored on the recipient’s phone, tablet, or watch.
After John unsuspiciously clicked on a link in a WhatsApp fake member’s message, no one in the chat group anticipated that the killer app would facilitate the transmission of the Russian virus at such a lethal speed, which wiped out the data stored on all twelve members’ devices.
Killer App by Covido March 5, 2022

Killer app 

Mobile application with doubtful usefulness that gets downloaded and used by a very large number of people, often without a valid reason.
Hey, once you are done with Candy Crush, check out Quads and Flappy Bird, they are the latest killer apps to hit the App Store!
Killer app by n.tex January 25, 2021

Killed Two Birds With One Apple 

Similar to the phrase "kill two birds with one stone" this term means to complete two discrete tasks with a single action. The term traces its origins to a practice, originally made popular by aspiring major league baseball players on the Gulf coast of Florida, of hurling apples at the apparently limitless number of pesky seagulls.
As Mariah's girlfriend walked in on him banging her mother, Mariah thought to himself, "I've just killed two birds with one apple"; I've both fulfilled my MILF fantasy and ended this shitty relationship.

flophouse 

Any house/apartment/frat house/trailer/etc. which is used for individuals to crash (sleep, chill, hang out, lurk, etc.) for a period of time. In order to "crash", one must not actually live there (e.g. have their name on the lease, own said flophouse, etc.). Flophouses are typically used by college students, drug addicts, transients, vagrants, or other unsavory characters.

A flophouse may also be the home owned by the parents of a college student, who after being away at college, wishes to live as if he/she is still at college (e.g. staying out all night, returning just to crash at mom and dad's house, then leaving again), rather than conforming to the pre-college rules.
Example #1
Dude: (Talking to someone passed out face first on the floor of his college apartment) Hey man, who the hell are you? What do you think this is, a flophouse??

Bro: Sorry dude, I must have passed out for a minute.

Example #2
Mom: Where have you BEEN for the last three days? You come home just to sleep?? What do you think this is, a flophouse??!!

Son: What's your problem? I'm an adult now!
flophouse by J3553 November 21, 2007
Word of the Day on July 27, 2026

Hate Sink 

A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.
Word of the Day on July 26, 2026