Where's Waldo Bug
Noun Phrase · Slang & Abbreviations
Definitions
A bug that is especially hard to spot because it hides among many distractions. In engineering slang, a Where's Waldo bug is the one tiny wrong thing buried in a giant field of mostly normal detail.
In plain English: A bug that is very hard to find because it is hidden among lots of other detail.
Example: "The off-by-one in the paging logic was a true Where's Waldo bug, buried in logs full of legitimate edge-case noise."