“Cantibal” (or “can’tibal”) and “canntibal” (or “cann’tibal”) have been suggested as the opposite of “cannibal.” “cantibal someone who eats a person, yet embarrassingly enough… cannot digest it” was entered in the Urban Dictionary on February 9, 2009. “New Word!—canntibal: (noun) one who eats human flesh, but cannot digest it” was posted on Twitter by The Addictionary on March 25, 2009.
   
“What do you call a cannibal that doesn’t eat human flesh? CANTibal” was posted on Twitter by Cool Youth Pastor on November 19, 2014. “What do you call a toothless cannibal? A can’tibal” was posted on Reddit—Jokes on July 11, 2017. “A vegan cannibal is also known as a cantibal” was posted on Reddit—Oneliners on March 13, 2019. “Cannibals implies the existence of Cantibals” was posted on Twitter by 💜feji🦄 on January 31, 2021. “‘cannibal’ implies the existence of ‘cannotibal’” was posted on Twitter by LG2D on March 5, 2021. “Did you know that a vegetarian Cannibal is called a Can’tibal?” was posted on Twitter by DogeRadio on August 7, 2022.
     
There are other jokes about vegetarian or vegan cannibals. “What do you call a vegan cannibal? Dead” was posted on Twitter by Shane Vaughan on July 27, 2015. “What do you call a vegan cannibal? Hungry” was posted on Reddit—Jokes on March 25, 2019. “What do you call a vegan cannibal? A disappointment” was posted on Reddit—3amjokes on April 8, 2013. (“Hungry” and “Dead” and “Canntibal” were added in the comments.)
   
       
Urban Dictionary
cantibal
someone who eats a person, yet embarrassingly enough… cannot digest it.
“did you hear about jose.??? he made a stew out of that girl, but got sick after eating it.”
“hah. thats what he gets. hes a cantibal.
by Slatoi February 9, 2009
     
Twitter
The Addictionary
@addictionary
New Word!—canntibal: (noun) one who eats human flesh, but cannot digest it. http://tinyurl.com/dgpw6q
10:38 PM · Mar 25, 2009
 
Twitter
Lisa Threedouble
@Fragileguilt
I want to make a real smart zombie movie so I can use “Are you a cannibal or a CANTibal?” That would win.
4:04 AM · Apr 5, 2009
 
Twitter
Cool Youth Pastor
@Muddin4Jesus
What do you call a cannibal that doesn’t eat human flesh?
CANTibal
ayyylmao
please believe…
2:46 PM · Nov 19, 2014
 
Twitter
Shane Vaughan
@SmidgeWrites
What do you call a vegan cannibal? 
Dead.
8:20 AM · Jul 27, 2015
       
Reddit—Jokes
Posted by u/HossMcDank July 11, 2017
What do you call a toothless cannibal?
A can’tibal
COMMENTS
AlexanderZotov
Maybe can’tnibal?
   
Reddit—Cleanjokes
Posted by u/HossMcDank March 2, 2018
What do you call a toothless cannibal?
A can’tibal
COMMENTS
SystemOfAClown
He can’t nibble.
   
Twitter
Howard Farran
@HowardFarran
Q: What do you call a toothless cannibal? 
A: A can’tibal
10:04 PM · Mar 2, 2018
   
Twitter
Apoorva Srinivasan(she/her)
@ApoorvaShrini
When cannibals turn vegetarian, they cantibals #TuesdayThoughts
9:55 AM · Aug 14, 2018
 
Reddit—Oneliners
Posted by u/jakebate March 13, 2019
A vegan cannibal is also known as a cantibal.
     
Twitter
WSⱯꓛꓤⱯS ꓨNIꓥIꓶ
@SarcasmLiving
A vegan cannibal is also known as a cantibal.
12:22 AM · Mar 14, 2019
 
Reddit—Jokes
Posted by u/[deleted] March 25, 2019
What do you call a vegan cannibal?
Hungry.
 
Twitter
It’s Bloggin’ Evil.com
@ItsBlogginEvil
#Horror themed #badjoke of the day:
Q: What do you call a vegan cannibal?
A:  A cant-ibal.
🤷‍♂️ #dadjoke #cannibalism #cannibal
12:07 PM · Apr 28, 2020
     
Twitter
💜feji🦄
@fejimanz
Cannibals implies the existence of Cantibals.
6:06 PM · Jan 31, 2021
     
Twitter
LG2D // Krow🔜Fureh 2023
@LetsGame2Day
“cannibal” implies the existence of “cannotibal”
11:35 PM · Mar 5, 2021
 
Twitter
DogeRadio
@doge_radio
Replying to @Chris_Meloni
Did you know that a vegetarian Cannibal is called a Can’tibal?
6:28 PM · Aug 7, 2022
 
Reddit—3amjokes
Posted by u/Key-Ideal-9121 April 8, 2023
What do you call a vegan cannibal?
A disappointment.
COMMENTS
Beginning-Ebb-9942
Hungry.
(...)
thebbe23
Dead 💀
(...)
Sloppyuniverse
A canntibal
 
Twitter
Derek 
@DerekNeverFails
What do you call a vegan cannibal?
A total disappointment
9:43 AM · Apr 9, 2023