“Actions speak louder than words”

“Big fish in a small pond”

An important person in a small group or limited environment.

“Against all odds”

Despite very low chances of success.

“Brush up on something”

To improve knowledge or skill by reviewing it.

“Back to square one”

To start again from the beginning after failing.

“Bottom line”

The most important point or final result.

“A storm in a teacup”

A lot of anger or worry about something unimportant.

“A hard nut to crack”

A difficult person, problem, or situation to understand or solve.

“Butter someone up”

To praise someone too much in order to get something.