Rollback
Reverting to the previous version when the new one misbehaves. The engineering equivalent of 'undo,' and the reason experienced teams ask 'what's the rollback plan?' before every launch.
Heard in the wild
“The release broke checkout — we rolled back in six minutes.”
Tone check: Technical
A tested rollback plan separates professionals from optimists. No rollback plan is a plan to improvise at 2 AM.