“In one piece”

“Flash in the pan”

A short-lived success that does not last.

“In the loop”

Informed about what is happening.

“In black and white”

Written or printed clearly.

“In short supply”

Not enough available.

“In the red”

Losing money or having debt.

“In good faith”

With honest intentions.

“In deep water”

In serious trouble.

“Head in the clouds”

Not paying attention to reality.