“Flash in the pan”

“Once in a blue moon”

Very rarely.

“In the driver’s seat”

In control of a situation.

“In the heat of the moment”

While feeling strong emotion, without thinking calmly.

“The elephant in the room”

An obvious problem that people avoid talking about.

“Dead in the water”

Unable to continue or succeed.

“Up in the air”

Not decided yet; uncertain.

“Diamond in the rough”

A person or thing with great potential but not yet fully developed.

“A shot in the dark”

A guess made without much information.