“Blank slate”

“Draw a blank”

To fail to remember or find an answer.

“Heavy going”

Difficult to do, read, or understand.

“Give it a shot”

To try something.

“Food for thought”

Something worth thinking about.

“Green with envy”

Very jealous.

“Hands are tied”

Unable to act because of rules or restrictions.

“Go pear-shaped”

To go wrong or fail.

“For a song”

For a very low price.