To “get cold feet” means to be nervous or anxious about an upcoming event. The expression has been used in several cannibal jokes. “When my mate Barry was invited to a cannibal restaurant he got cold feet; so he sent them back” was posted on Twitter on June 29, 2012.
   
A joke was posted on Reddit—Jokes on December 7, 2016:
   
Q: Why did the cannibal leave the restaurant?
A: Because he got cold feet.
   
“Never go to a wedding in the winter. Someone always gets cold feet” is another “cold feet” joke.
   
   
Wiktionary: get cold feet
Verb
get cold feet
1. (idiomatic, intransitive) to become nervous or anxious and reconsider a decision about an upcoming event.
The groom got cold feet before his wedding.
 
Twitter
an cailín cainteach ☘
‏@Trillian_01
Careful you’re not late to the cannibal feast or you might get the cold shoulder… RT @MrCraigBierko At the last minute I got cold feet.
11:17 AM - 7 Dec 2010
 
Twitter
Steve Varty
‏@4EverSteve
When my mate Barry was invited to a cannibal restaurant he got cold feet; so he sent them back.
9:48 AM - 29 Jun 2012
 
Twitter
Clod #978
‏@IGseanAuthier
In the dinner before his wedding, the cannibal got cold feet.
6:12 PM - 11 May 2015
 
Reddit—Jokes
The cannibal nervously decided to try his first human meal
submitted July 23, 2016 by aidan_stuart
Much to his dismay, he got cold feet
 
Twitter
Michael Crane
‏@cheshamclaret
@piersmorgan @Brucescribbler @_AaronD7 @harlinexal I went to a cannibal restaurant on my own as last time the missus went she got cold feet
9:44 AM - 25 Oct 2016
   
Reddit—Jokes
Why did the cannibal leave the restaurant?
submitted December 7, 2016 by Arik5502
Because he got cold feet.