Meaning of the word "laugh and grow fat" in English

What does "laugh and grow fat" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

laugh and grow fat

US /læf ænd ɡroʊ fæt/
UK /lɑːf ænd ɡrəʊ fæt/
"laugh and grow fat" picture

Idiom

a proverb suggesting that a happy, carefree attitude leads to good health and physical well-being

Example:
Don't worry so much about the small things; remember, laugh and grow fat.
He always has a smile on his face, living by the motto laugh and grow fat.