“Hold the fort”

“For the time being”

For now; temporarily.

“From the ground up”

From the beginning or basic level.

“In the loop”

Informed about what is happening.

“Cross the line”

To behave in an unacceptable way.

“In the red”

Losing money or having debt.

“Down the road”

In the future.

“Get in on the act”

To join an activity that others are doing successfully.

“Fly under the radar”

To avoid attention or notice.