reboot button
nounUK /ˌriːˈbuːt ˈbʌtən/
US /ˌriˈbuːt ˈbʌtən/
A button you press to make a computer or machine start again.
When the tablet froze, Mia pressed the reboot button and it worked again.
OTHER MEANINGS
2. A way to begin something again from the start.
The coach called a timeout as a reboot button for the tired team.
3. A button that turns a device off and then back on by itself.
Hold the reboot button for five seconds to restart the router.
4. A fresh start after a mistake or a break.
A good night's sleep is like a reboot button for your brain.