A joke about a dancer’s birthday has been printed on an image:
 
“Did you hear about the dancer’s birthday? It was a tappy one!”
 
The “tappy” birthday saying has been cited in print since at least 2006.
 
       
pastorway
SATURDAY, APRIL 22, 2006
Phillip’s Phunnies - Birthdays
(...)   
Q: Did you hear about the dancer’s birthday?
A: It was a tappy one!
 
Idle Humorous Ramblings
SUNDAY, APRIL 23, 2006
Cute Birthday Jokes
(...)
Q: Did you hear about the dancer’s birthday?
A: It was a tappy one!
 
Yahoo! Answers (October 28, 2008)
Q: Did you hear about the dancer’s birthday?
A: It was a tappy one!
 
Twitter
darline_mumford‏
@darline_mumford
Did you hear about the dancer’s birthday? It was a tappy one!
3:22 PM - 30 Dec 2009
       
Google Books
Brainless Birthday Jokes to Tickle Your Funny Bone
By Felicia Lowenstein Niven
Berkeley Heights, NJ: Enslow Publishers, Inc.
2013
Pg. 16:
Did you hear about the dancer’s birthday? @ Dense @QIP @6909 It was a tappy one!
 
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?:
Did you hear about the dancer’s birthday? It was a tappy one!
 
Twitter
Lucky Score‏
@LuckyScoreNet
Did you hear about the dancer’s birthday?
It was a tappy one!
#Joke from #BirthdayJokes in #Jokes, #Humor and #Satire
6:00 PM - 6 Feb 2018