“Go belly up”

“Smell a rat”

To suspect that something is wrong or dishonest.

“Blow your own trumpet”

To talk proudly about your own achievements.

“Bottom line”

The most important point or final result.

“A storm in a teacup”

A lot of anger or worry about something unimportant.

“Go without saying”

To be obvious.

“Go the distance”

To continue until the end.

“Go hand in hand”

To be closely connected.

“Brush up on”

To improve knowledge or skill in something.