“Eat humble pie”

“When it rains, it pours”

Problems often happen all at once.

“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.

“Bottom line”

The most important point or final result.

“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.

“Eat your words”

To admit that what you said was wrong.