wrongbutton
nounUK /ˈrɒŋˌbʌtən/
US /ˈrɔːŋˌbʌtən/
A wrongbutton is a button that does something you did not want it to do.
I pressed the wrongbutton and the screen went black.
OTHER MEANINGS
2. A button that is in the wrong place on a device.
The wrongbutton on the remote is too close to the power key.
3. A person who always presses the wrong button.
My little brother is a real wrongbutton with the TV remote.
4. A mistake made by pressing a button.
That wrongbutton deleted my whole game save.