This phrase has multiple definitions: 1. You have made a small error due to incompetence or defect. 2.You have made a large error and are worthy of institutionalisation. 3.You are brain dead and require constant help and support to get through the day.
*Emily tries to unlock a BMW with her Toyota Echo car keys.
Richard: Damn it Emily! Your Omelette Brain is getting worse!
Richard: Damn it Emily! Your Omelette Brain is getting worse!