“Rock the boat”

“The calm before the storm”

A quiet period before trouble or intense activity begins.

“Weather the storm”

To survive a difficult period.

“The ballpark figure”

An approximate number or estimate.

“The final straw”

The last problem that makes a situation unacceptable.

“Think outside the box”

To think creatively and differently from usual.

“Take the plunge”

To decide to do something important or risky.

“Throw caution to the wind”

To take a risk without worrying too much.

“A shot in the dark”

A guess made without much information.