sinking feeling

He told the BBC: "It was a penny dropping moment and it was a sinking feeling."

Murphy has dropped a few hints in interviews in saying he was inspired by the sinking feeling that the world is ending, sucked into the vortex of a death spiral between good and evil.

Every hiker in Los Angeles knows that sinking feeling.

It's caused a stink nationally, and at a popular bathing spot along the River Avon, some locals have a sinking feeling about the quality of the water.

A sinking feeling hits the pit of my stomach.