When you die from a disease or other illness that you made fun of in the past.
John Bain Syndrome got its name from John Peter Bain A.K.A "The Cynical Brit." In the early 2010s, he came under fire for telling someone to "go get cancer and die."

Needless to say, the Internet was NOT very sympathetic when he revealed that he had cancer himself, citing this infamous moment many times. They practically rejoiced when he revealed that it was terminal.
by Someone who kinda exists May 24, 2021
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