“A fighting chance”

“Fat chance”

Very little or no chance.

“Smell a rat”

To suspect that something is wrong or dishonest.

“The ballpark figure”

An approximate number or estimate.

“The final straw”

The last problem that makes a situation unacceptable.

“Start from scratch”

To begin again from the very beginning.

“Think outside the box”

To think creatively and differently from usual.

“Take the plunge”

To decide to do something important or risky.

“Sit tight”

To wait patiently and not take action yet.