Blackheimer's Disease

A sickness in which the afflicted has difficulty identifying a famous black person or confuses any given famous black person with another famous black person.

Lyle: Name me a movie starring Samuel L. Jackson.

Meryl: Lethal Weapon?

Lyle: I think that was Danny Glover...

Meryl: The Shawshank Redemption?

Allen: Girl, you got a bad case of Blackheimer's Disease!