Don't be such a numbskull!

The medulla oblongata is responsible for controlling vital functions such as breathing and heart rate.

Don't be such a wuss and face your fears.

Don't be such a lamebrain!

Don't be such a chucklehead!

He had never seen such a beautiful sunset theretofore.

I can't fathom why she would do such a thing.

The ending of the movie was such an anticlimax.

He is such a dolt.

Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties of celestial objects such as stars, galaxies, and planets.