“Get in on the act”

“Lay your cards on the table”

To be honest and open about your plans or feelings.

“In the loop”

Informed about what is happening.

“Get the green light”

To receive permission to start something.

“In the red”

Losing money or having debt.

“A slap on the wrist”

A very mild punishment.

“Leave someone in the lurch”

To abandon someone when they need help.

“A walk in the park”

Something very easy to do.

“In the works”

Being prepared or developed.