“Through thick and thin”

“Under the weather”

Feeling slightly ill or unwell.

“On thin ice”

In a risky or dangerous situation.

“When pigs fly”

Something that will never happen.

“Kill two birds with one stone”

To achieve two goals with one action.

“Raining cats and dogs”

Raining very heavily.

“Put two and two together”

To understand something by connecting facts.

“You can’t have your cake and eat it too”

You can’t have two incompatible advantages at the same time.

“Once and for all”

Finally and permanently.