to file off the serial numbers
- phrasal verb
- NSFW
- You just filed off the serial number.
Examples
-
The thief decided to file off the serial numbers from the stolen equipment to avoid detection.
-
Hoping to get rid of the evidence, he used a grinder to file off the serial numbers on the firearms.
-
To sell the stolen laptops, the criminal had to file off the serial numbers first.
Synonyms
Remove marks, writing, or digital files so they are no longer visible
To rub a surface with a small rough tool to remove something
Remove or hide personal details so a person cannot be recognized
Remove personal details from data so a person cannot be easily found
Antonyms
Surface Forms
Morphology
file + off + the + serial + number
The meaning is compositionally derivable: 'file' (to abrade or remove material) + 'off' (remove) applied to 'serial numbers' (identifying numeric marks) yields 'remove identifying marks by filing'. This is a literal, action-based construction that a B1 learner who knows the constituents and basic phrasal-verb pattern would readily understand.
Etymology
File off the serial numbers comes from a real action: someone uses a metal file to rub away the small stamped serial numbers on a gun or machine so it cannot be traced. So today it means 'to remove identifying marks' or 'to hide where something came from'.