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2 definitions by Papy Jojo

 
1.
"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
by Papy Jojo March 19, 2007
 
2.
Kung grattis is a swedish intentional mistranslation of 'congratulations' (accurately translated to 'gratulerar' or 'grattis') where the extra "kung", meaning "king", applies a majestic weight to the wishings. Kung grattis is widely used ironically.
1) Ironical usage:

- Why so somber, mate?
- Just told Anna about Sarah.
- Kung grattis...

2) Used as sincere congratulations:

- Tillåt mig att kunggratulera! Du har vunnit en brödrost med inbyggda blinkers!
by Papy Jojo March 15, 2007