“Go pear-shaped”

“Fat chance”

Very little or no chance.

“Go belly up”

To fail completely, especially a business.

“Fight fire with fire”

To use the same methods as your opponent.

“Fit as a fiddle”

Very healthy and strong.

“Food for thought”

Something worth thinking about.

“Green with envy”

Very jealous.

“Hands are tied”

Unable to act because of rules or restrictions.

“Go without saying”

To be obvious.