Break someone’s heart
To break someone’s heart is to make them really sad.
- Peter broke his mother’s heart, when he failed his test.
From the heart / from the bottom of your heart
To say something from the bottom of your heart is to say it in a very sincere way.
Have a heart of gold
When you have a heart of gold, you are very kind.
Tug / pull at your heartstrings
If something pulls or tugs at your heartstrings, it arouses deep feelings of compassion or love.
Take something to heart
To take something to heart is to be very upset by criticism.
Wear your heart on your sleeves
To wear your heart on your sleeves is to show your feelings openly.
Bring someone to heel
To bring someone to heel is to bring them under control.
Cool your heals
To cool your heals is to keep waiting.
Take to your heels
To take to your heels is to run away.
Come hell or high water
Whatever difficulties may occur
Someone’s heyday is the period of greatest success in their life.
Hide your light under a bushel
To hide your light under a bushel is to keep quiet about your plans.
On your high horse
To be on your high horse is to behave pompously or arrogantly.
Over the hill
When you are over the hill, you are old and past your best.
Hit someone below the belt
To hit someone below the belt is to behave unfairly towards them.