Coulrophobia - The fear of clowns
It's debateable if anyone really likes clowns in the first place, and after Tim Curry's criminally overlooked portrayal of Pennywise the Clown in Stephen King's 'It' it isn't surprising that there's a full-blown phobia of them.
Whether it's just the make-up or the deranged cheeriness that makes those with Coulrophobia run for the hills we don't know.
But what we do know is that there are plenty more extremely specific phobias in the world all with their very own titles...