“What’s the difference between a good joke and a bad joke timing” is a joke that has been printed on several images. The word “timing” is misplaced and should be in a new sentence, not in the question.
   
“What’s the difference between a good and a bad joke timing” was posted on Twitter by Joel T. Collins on December 24, 2015. “What’s the difference between a good joke and A bad joke timing” was posted on Reddit—Jokes on June 15, 2016.
   
     
Twitter
Joel T. Collins
@jtc9242
Replying to @Clemmie_1
@Clemmie_1 What’s the difference between a good and a bad joke timing.
4:41 PM · Dec 24, 2015·Twitter for iPad
     
Reddit—Jokes
Posted by u/memgrizz72 June 15, 2016
What’s the difference between a good joke and
A bad joke timing
 
Twitter
Samantha Dowd
@samanthadowd935
What’s the difference between a good joke and via /r/Jokes
A bad joke timing
6:29 PM · Jun 15, 2016·IFTTT
 
Twitter
Shit Jokes
@ShitJokes
What’s the difference between a good joke and a bad joke timing.
2:26 PM · Jul 19, 2016·Twitter for Android
 
Twitter
Bad Dad Jokes
@baddadjokes
What’s the difference between a good joke and a bad joke timing.
#dadjoke #jokeoftheday
1:38 AM · Jun 21, 2017·Twitter for iPhone
 
3 July 2018, Daily News (Warwick, Queensland), “Today’s Joke,” pg. 2:
WHAT’S the difference between a good joke and a bad joke timing.
 
Reddit—Jokes
Posted by u/Dganjo February 5, 2019
What’s the difference between a good joke and a bad joke timing
 
Twitter
The Dad Joke Man
@DadJokeMan
What’s the difference between a good joke and a bad joke timing.
6:40 PM · Jun 27, 2020·Twitter for iPhone