back out

verb7

1. •
   To reverse (a vehicle) from a confined space.

   • He backed out of the garage.
2. •
   To withdraw from something one has agreed to do.

   • She backed out of organizing the fund-raising.
3. •
   To exit a mode or function.

   • I chose that menu option by accident, so I pressed Escape to back out.
4. •
   To undo (a change).

   • I had to back out the changes made to the computer when it became apparent that they had stopped it working properly.
5. •
   To convince (someone) to withdraw from a challenge.
6. •
   To bet on someone losing.
7. •
   (slang) To draw from behind the back (a knife etc.) (as also bare back).

   • Anything 4 get bun, back it out see the paigons run Can't believe that my door got spun, I just got nicked for a loaded gun — 2018