(adjective) : A sound to describe an extra chromosome
Doctor: "What seems to be the problem with him"
Nurse A: "He keeps screeching. He's showing symptoms"
Doctor: "It can't be that serious? Let's take a look"
Patient: "EE EE ER"
Doctor: " Yeah that's definitely an extra chromosome. "
(adj.) - A term to describe an extra chromosome.
Typically pronounced while motioning a single hand to tap one's chest three times.
"I heard the doctor say that Michael has EE EE ER"