“A user interface is like a joke. If you have to explain it, it’s not that good” is a saying that has been printed on many images. The saying was posted on Twitter by Martin LeBlanc (founder and CEO of Iconfinder) on May 14, 2014.
   
       
Twitter 
Martin LeBlanc
@martinleblanc
A user interface is like a joke. If you have to explain it, it’s not that good.
1:56 PM - 14 May 2014
   
Twitter
Iconfinder
@iconfinder
A user interface is like a joke. If you have to explain it, it’s not that good.
3:28 PM - 14 May 2014
 
Google Books
Hello, Startup:
A Programmer’s Guide to Building Products, Technologies, and Teams
By Yevgeniy Brikman
Sebastopol, CA: O’Reilly Media, Inc.
2016
Pg. 140:
A user interface is like a joke. If you have to explain it, it’s not that good. —[LEBLANC 2014], MARTIN LEBLANC, FOUNDER OF ICONFINDER
 
Reddit—Webweu02
“A user interface is like a joke. If you have to explain it, it’s not that good.” (plus.google.com)
submitted March 30, 2015 by Seetee
 
Reddit—ProgrammerHumor
A user interface is like a joke (self.ProgrammerHumor)
submitted April 27, 2017 by Necroman_Empire
If you have to explain it, it’s not that good.
     
Google Books
Learn Python Programming:
A beginner’s guide to learning the fundamentals of Python language to write efficient, high-quality code (Second Edition)
By Fabrizio Romano
Birmingham, UK: Packt Publishing Ltd
2018
Pg. 369:
“A user interface is like a joke. If you have to explain it, it’s not that good.” – Martin LeBlanc
 
Reddit—Jokes
A user interface is like a joke
submitted June 10, 2018 by TidusJames
If you have to explain it, it’s not that good
 
Reddit—Jokes
A user interface is like a joke
submitted August 9, 2018 by WubbaLubba_dub-dub
If you have to explain it, it’s not very good