A heart of gold is a deeply kind and generous nature. He has a heart of gold, a heart of gold underneath, rough but a heart of gold.
It is nearly always used of somebody whose manner hides it, so the phrase usually follows a but. It is warm, slightly old-fashioned, and entirely sincere.
1phraseheart of goldA deeply kind and generous nature.
“He swears at everybody and has a heart of gold.”
heart of gold is a phrase.
Practised in Idioms