“Sleighed” sounds like “slayed.” A Christmas riddle was posted on Twitter by galarian emolga on May 6, 2016:
 
Q: How did Santa kill a dragon?
A: He sleighed it.
 
“Santa hit a dragon and killed it whilst flying over medieval England… guess you could say he sleighed it” was posted on Reddit—Dadjokes on December 17, 2019. 
   
 
Twitter
galarian emolga
@theravenboys
how did santa kill a dragon?
he sleighed it.
i had to tell that now bc by christmas i would forget it
12:42 AM · May 6, 2016·Twitter Web Client
     
Twitter
galarian emolga
@theravenboys
its capriCORNY joke time! while santa was delivering presents, he ran into a dragon. but dont worry, he sleighed it.
12:02 AM · Aug 31, 2016·Twitter Web Client
   
Twitter
Kenzie🌻
@kenzievaldivia
“What did santa do when the dragon attacked him? He sleighed it.”
12:58 AM · Dec 5, 2017 from Gilbert, AZ·Twitter for iPhone
   
Twitter
James
@JamesRCarter99
December 7th - 18 days till Christmas 🎄
What did Santa do when the dragon attacked? 🎅
- He sleighed it
12:33 PM · Dec 7, 2019·Twitter for iPhone
 
Reddit—Dadjokes
Posted by u/Arctic_Womble December 17, 2019
Santa hit a dragon and killed it whilst flying over medieval England…
... guess you could say he sleighed it
 
Twitter
Hanjaro
@Hanjarolol
Santa hit a dragon and killed it whilst flying over medieval England…
... guess you could say he sleighed it
7:17 AM · Dec 17, 2019·Twitter Web App