We felt like bird brains after forgetting our passports at the hotel.

Even after repeated explanations, the durr-brains still couldn't grasp the concept.

The meeting was ruined when those lame-brains started arguing about trivial details.

Don't listen to those lame brains; they don't know what they're talking about.

The marketing campaign preyed on our reptilian brains, triggering fear and urgency to drive quick purchases.

Left-brained scientists sometimes underestimate how much right brains contribute to creativity.

The conference organizer was frustrated when the panel turned into a shouting match among feather-brains.

The neurologist explained that the child's progressive weakness and severe vision problems were due to muscle-eye-brain disease.

Calling that strange invention a bird of one's own brain honored its creator's eccentric originality.

Washing one's brain out with soap, she convinced herself she could forget the trauma.