A person who is afraid of being happy. Mostly, cherophobic people doesn't want to be happy because they feel like something bad or tragic will happen sooner after they become happy.
These people believe that life is fair. They believe that when it's right, something always will go wrong.
She's cherophobic. She keeps herself from being happy because she believes that when something good happens, something tragic will happen right after.
The guy sitting in front of Debbie on the plane chummed into the blanket. Debbie had to go to the back of the plane and get out of sight of the incident because she is so chumaphobic.