[Name] Head-go-boom-boom-itis [Source] SpongeBob SquarePants (Squid baby) [Symptoms] 
A mental disorder that causes adults that receive a head injury to develop a big baby-like brain tumor than later causes them to exhibit infantile-behavior, while still possessing the physical traits of an adult. The disease was possibly intended as an analogue to Autism, Down's syndrome or a related condition.[citation needed]