Here are some common idiomatic expressions in English.
A bitter pill
A bitter pill is an unpleasant or difficult situation or information that must be accepted.
A dime a dozen
If something is a dime a dozen it is readily available or inexpensive.
Tomatoes are a dime a dozen.
Ace in the hole
This expression is used to refer to an unrevealed or unknown advantage.
Even strong people can have a fatal weakness. The expression Achilles’ heel is used to refer to this weakness that will bring about the fall of a person.
Actions speak louder than words
You can judge people’s character or intentions from what they do rather than what they say.
Add insult to injury
To add insult to injury is to make a bad situation worse.
When you are all ears, you are listening intently.
When you are all thumbs, your actions or behaviors are clumsy or awkward.
An arm and a leg
This is an expression used to refer to a large amount of money. If something costs an arm and a leg, it is very expensive.
Apple of discord
This expression is used to refer to something that causes trouble or discord.
At the drop of a hat
To do something at the drop of a hat is to do something instantly or without hesitation.