Convenient Autistic Cousin is a (Theoretical) relative, usually between
4-7 year old who is autistic once you tell someone that you are Autistic.
Allistic people attempt to use this theoretical relative as a way of saying "You
don't look Autistic (Because there is a stigma about relation between Autistic folk and mental disability)" to either invalidate you or as an incredibly
bad attempt to relate to you in some way.
Somehow said Cousin is always male and younger than teenage years. Sometimes might be preceded (or followed by) phrase "You
don't look Autistic!". Nobody ever actually has seen the cousin in question, Our Scientists believe said
person to be in quantum state where they appear in Allistic mind only when they are faced with
reality that the
person they talk to is Autistic; and seems to disappear the moment he (Convenient Autistic Cousin) is no longer needed.