Don't be a hero

Meaning

A reminder to prioritize safety or common sense over reckless bravery. It is usually said when someone is about to attempt something dangerous or ill-advised.

Pragmatic, cautious

Used in a sentence

• Just call the electrician and don't be a hero trying to fix it yourself.
• If you see the alarm going off, leave the building and don't be a hero.
• I am going to help you with that couch, don't be a hero and carry it alone.