Refactoring Worm
Noun · Hacker Culture
Definitions
A joking metaphor for the urge to keep refactoring deeper and deeper once you start touching a code path, expanding a small change into a much larger cleanup effort. It names the slippery slope between useful improvement and uncontrolled scope growth.
In plain English: The tendency for a small code cleanup to keep expanding into much bigger refactoring.
Example: "I opened one file to rename a method and the refactoring worm turned it into a three-day cleanup."